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 0x46d2bd4a3f57f70a485a1380b54a148fcab6b632d8f5de4f21e5d20cd8b6fd4e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac786a8b-0fd5-42db-b3b8-184e6f074979.json and https://artists.proofprofile.net/proofs/artist/ac786a8b-0fd5-42db-b3b8-184e6f074979.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 0xd32f7ad88659085643991f5d79250771460908efb59d780f5f60f7d13f51aa2b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DK9D51901001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2ff255834a970e3a14b38a379081c502ca6f8f3d78d072a4db1e22a72e80ce. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWV2091988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e1f2b3f75dcef88c958a12a3e7ef483d5cefa5db7c08b67d5866317eb2fbec. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZNWV2091990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21909b8fd879d62fb1615b3a1e29bd9dd21fb85e98522bbb29be5ec45646dee4. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZNWV2091991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc2471b6372cddbef42fd0802d09ad6519e7ac26d8ee135fc8bd9fc58423570. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNWV2091992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfa9dd2e145d42cc5e5804a27937ae9b0d9a19f9b5c8b27b472171d5de9bf35. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:38Z), 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/QZNWV2091995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2d01e53dc6ca862b38b1537831ff2c1fb533abf83ac711206dfb36937b7dd8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZFZ72173962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5ae8c08ba05f600ae7c8e38f3d963d3936c739f8736159dce8224f9f6843a6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DK9D51700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41920b1b54bdad9eae44d4988543dd3d7cf68a73d247eac7e2b618a8f361bcbf. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USX9P2058326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e5b136b9298db4b66b402248cdff674e415f771e91bf77aa3e379e801716de. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USCGJ2131467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa289a492dd3f88f4d6fc36553792a96626f84f8b88fc085b3fa8b8ff80d9fbbf. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:55Z), 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/USCGJ2131469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89e7281a7d607ab00508a3c14d25cdbb2fd1bf6b835db99bb864e99300a6416. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ2131470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e050421dac2fd1e14c80f362f034ae59d3f74de4418a2b8bf62e0939d128107. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZDA52448823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ea003860a22b92826d31582ec8028782c02744d0cfeb557deeaf24a359c15c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA52448824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a29188aff673a2057e938c401bb5d789012267d5b3ce0fac536f2c48a3fdd0. 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/QZDA52448825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7437e0c1d8af05d79923611964d08a0dc3ed4347fcd3836b7e8b6c3c8a6704. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES72408152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c883507e5b0ddb00fed8fe3f67e0effdaa5152e8ff46b4f20a404e62a904203. 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/QZDA52448826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf4c41dd51810fc85d2df081ab9661c042442c9bf9c3d71369072d9127a2001. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES72408155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84276ed95ffe2c645996bfe3f0133e58a66e50f606d590fc0d84b27103b40da5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZES72408149.
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 0xae664b21571616ba7189e0cfafc760f175ccc00e3410a2e1ea83c33772cc5bc4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZES72408150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2953ccbec587d67f3e579a712e75feef0f73f94463d5682644ecdd70ead2ae92. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZES72408151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd181b22fd499c43cdbaa5bbc3bec58e56d239339739cbead3b0c6af3ac7c39. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZES72408153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e7422fdd0d398f9685503a9d8f719723d3bc29680cf8e2b3d927bca1b35868. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZES72408154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a057be5b804cb47ddfe3b4b457056db2a9ae1ba5a2d604fbc1cf90ea9e1fe7. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QZES72408156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4636b17f10c936ffe04f11737dc9111154cf806ab470fbb0d464324bea58db07. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZDA52448827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b95c632f93c4acb3164ef50ef3b97e9050484bbc55c326345016cf17fa8ad7. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNWU2499744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e407efe9822003a945e07df7af7295c5b4756944bfcd3e627c77a69d541cfdc. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:31:52Z), 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/QZK6G2460225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87fbdee0faaa5688f2c982ff4b174336dad122d883d4b237ad990b7a72152ae. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZMEQ2428375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbe21a032b896b6846b8f15d1a16954bb102fb25c3f9341daaf8875f8d6bd7c. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:22:14Z), 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/QZK6G2458404.