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 0xdd1f8eaf4799705452e507b526dcf4f647ce7bbd599bb056327bfb1704c5f184. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8cf2567-ec33-4d8a-b308-6e3501396218.json and https://artists.proofprofile.net/proofs/artist/f8cf2567-ec33-4d8a-b308-6e3501396218.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 0xfba67387ee419785b64e0f2868affa0f8e9532f0426edc1a4aab4a797a5003b7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUBEC2134065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0134f381a4025d908a87cd380368729c226674e7901a692777b6a4b595114118. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/AUBEC2134079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14553117289ac05f1ee42c0df19f770f58675082e4016c4d9701b59b3f9bf91d. 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/AUBEC2134069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd01ebbf37b6fc6a8a6b2c6929b1fc29ee196d52c698514e546a5f74c43d7421. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:22Z), 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/AUBEC2201814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fa2a634fd33de4677e6631537ebafbe01674dc25115c01644e95a3f0a4aee5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AUBEC2201815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9574183c423b8cc8a3578b2446c95a38303f52882a65eae227b3827c577855. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUBEC2201818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcfe0e0ac8eca04e7178180e15cc2ad95537fd311306907205ef48f0fa217e4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:49Z), 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/AUBEC2201820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf51067b28ce37a2dc6e7e530c043dadbae7564eae55e21140043f85797df351. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/AUBEC2201821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a48df1701e98e6a76bc42810c784f81d68ab71797367bdafe49eb981bc00ae7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AUBEC2330810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083b03097e91fdf84a827d2c5fe682040e052ee2e3e9d97b43213042793f9a81. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:48Z), 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/AUBEC2330812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc343b31288ca8d4c0435fc4fa0cf7cfeba7dee1c4045f0d615baaab517dcc6f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AUBEC2330808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad24ccf4ad04b10cb589ba7a4b2f45626fadb063dd40c6205178ff4cc6caf5e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUBEC2330807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a1dc7ba216126cc8015348e57d8b9a609972432b75adbcbc230f1060cebcef. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AUBEC2460038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfd37c48dee319b9ce10cf3116bd98f75183a4565d3235eb4f45b031895542b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:00:18Z), 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/AUBEC2460036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbdfcd288f421aadf57151aaf015399354b379d1f4c534772fda2c7c922a166. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUBEC2460037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7871e8aed5565b0d6052768fc0aaa60afd09baf58ce9110cdca268452050d3b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AUBEC2460039.