1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3812bfa925ec0b21a06cfaa54103c16219bb7ec72d9be690259803890ecdd5eb. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ba9aeef-de0c-48ca-a69c-443bcbc46221.json and https://artists.proofprofile.net/proofs/artist/6ba9aeef-de0c-48ca-a69c-443bcbc46221.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784bca35fe56bc617e11dc173d05ed2c2a618dfe3bcfecb3a58b877464ee3728. Chain 2 (Bitcoin): anchored in block 957244 (2026-07-09T01:44:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32488490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed5956691340afebe3496a66caa1bd1b9000b271c233c042aa8c091131c3871. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32488491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a826449017e9a5c8f33e0c74385bf43dfc420f36f0bcfaf4830d9ea29fb0e8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32488492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd1ce6d29ed0242c81c179776e4297e72eb19d07807d8b6696b4ab0495bd465. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGT2380904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499fc815718ed46ef7e71b9d7f481e183e3943e2df05cc2320c6f0e31eb97010. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGT2380910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd963080a3728aebbc5f73105a1092f6bb5e0d130df9c9e20ee0271dad3bbbb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGT2380911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08d3ea50e48106650c934a8208532b37c69cd5eb97736a65892d7e6cc028671. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGT2380912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cc6198bc3ae5f3f51e2adcea5da3b2f513dfccbbbc82ba579c03657a48e27a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGT2380914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdac2395e3da70f0e6e3c8efc9bf401e91e8505367b675b78112482f4d71c6d1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGT2380916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff62cd9773208618a52b20c468331de1e18be4ff86afe1fc49001a26ee5b270. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGT2380917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0948f25b508b59d8adc91ec9284bd71575bab75cf9b03976779409186d5bb1b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGT2380919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa043421cd3d2936a2d37e5a2a055675a77e584a0d079d0d4db1ccf3a2edf9f6e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGT2380923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fb49225f1b69fab6d5e117a59f0770e74248bf1c23470b1eca034a9a05fd0d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2115550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb472a498942aa2a40ed5fa49a9a5863ef8e2af3939ccac377d1efc7ce415dcab. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2115552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf388d46d0cf5ef08e22f894a185b277303c4fe893022723c261f7b1219723caf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2115556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb31e5f00f10ae5680bf67cb6b033e04c6384f1209de9356390e9950d12638a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2115551.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f78afac931dd79351e0ea54c4e9504c01d42a82ede63a3d41bdc1959f25ee4a. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2115553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78967bf721444a5ce52d3ec021010bb1e52cdf52feeccff8f34d18b5299d82f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2115554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf55d86505bb1f66850cb99b43e020df6abf1162ed4e758f331905cdb7546c0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2115555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4122a7b5cceeb371078f34a094bf7260740ce9ac1e1ece46ecc70841b507c999. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHM2348087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad85924dd3a0c33d1bf7db365f5585b1f7edaecc2ad9ade50bbf5f23df60a220. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHM2348090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0463cb04b1978e2e480e482400b2c772d95603945b10f9243f5d1ddf1dc230a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHM2348094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984504dc64a877223d56b57811823662f40f3af8f303804376285d808b9378a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHM2348101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e12d74c559ca05ad608e02f990f763452d4269a400b0edfa60a4ffd9747cfcf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHM2348111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e18e383ffd619d15106f0a6e9785657dfb9e1ec4baf9980a2e07025297b998. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHM2348120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde860b8f0f0c2b834ca50526ed20d257f3dc0d2aa04e6deb5fe8b92a3cb1f938. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAHM2348118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f12a3cbdc90e2574cbf87c2523de53f0415d7ec7015aee96e70abb065ff353d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32434319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37e1a5ec18a50bde645de155993fbeaf3f57f184793c08d7267ad4cbb7d1a85. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32434320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c53b8c11d7e9d2a1cc693cc96854232689c0e25a4acb77865c688713e58aaa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32434321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc389af7315a521812e8d1fdad0e5120c727f0b6860f501b1409c74c26e0f33. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32434322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7059ee22ed08cbd0a580a63cf993a7fa548a8df653acfa02caef5cb9e976b0bf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32434323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b3483e6c3b14b07ef0e243e0fff6e5ff69b2c58127e4a8c270c08f9ed5402d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32434324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ea9b8e728d4977988505b43420dc4c229201cfb9d3aafac292e0c384f05470. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ32434326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e37fa94ea38a0c4c67f0ed84986e263df55fb01f98f9ffb1280ef84339275c7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4H22405002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07681b426074be9de6c397fae4ad8d68704c00d52b75ccaa0c0de1c9f6b713c6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4H22405004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7042a116ef51107bba7e171061e892e0daa6fb4f9edf97bb0d46d19ab16e0b9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4H22405007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc074306f15e92113b92df1eb66ba28d98daced3e046dcad87bf68104e77fd577. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTPX2446406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe879afedd5f4278b6aefb1574ed08a00721e847752c0cfc4742238219ee1033f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2420428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b71e041d7f057d3dbe81f37948a0f2460a7dc0f5495dfafad60599ee222d3b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:30:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFX2473497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cbadd659fe2c73aca56eaa4699b3de41a2ad3e60bd264d5fd44bc6550782f5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFX2473498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb45780955fd80b371b6b25cc6074c454040a2d3cb1c529853fc4fdd1888c60e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7M2423872.