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 0x88c625290a6310c88987d7155c8cc45b9a1cc20f229c7fac073003f6ab540838. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9874be75-95bc-46c4-8bf4-6083d62824e1.json and https://artists.proofprofile.net/proofs/artist/9874be75-95bc-46c4-8bf4-6083d62824e1.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 0x5a59b340e81f01b9b7538380af2da31076b1982cae4065647e81b29f852525c4. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZK6K2474172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea42dc9ab1225917f0d5610e0903a8724ae889f168fe3c5339cebe97921db31e. 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/QZK6K2474173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d41441c96d5bd0e7662f46f19055991b85185f20ad4e6a490f335201219dd3. 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/QZK6K2474174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510677b1a7e8229d7926a9c3912788daad702b0f5c26c80a10a482e6392c51c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZES92374718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a11533172ad3653ebdd5ea75c1d1d851854e74d2742e3692aa72ab10427c24. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6K2474175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e214c81f8d00b9529cbeb8b5daf560c6b8642c7fa619ef7702a44ff1025ba4c. 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/QZK6K2474176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947547ac8f1ea34d118704a6f53717c471147d69ce79148c6274346a3edaacda. 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/QZK6K2474179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bcfad16d0ba13955f84c4abf26c93c6bc239be4252dc709d853373b363db25. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6K2474180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a597f22bab346f0de6ba0b30e789d300627b7f859102d28aa5641ddde929da. 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/QZK6K2474181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b52d578c4c8992214ebd8212cf9c4ccff4a324b0bfd49f347f5a7ee8e6b129. 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/QZK6K2474183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c35fe5e35a4ab8140d73ec5cd34906b80fe0067ade291885c0e991f41b026ac. 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/QZK6K2474184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123cca9de4a747c9c0f0066bf058025685663d9348340a14cc4e851201b59f35. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZK6K2474177.
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 0xc32c70c2516441c3de2549bdd4fc97aad0140bcf8a584f9f69709d1f69dd2b8c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN82420443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653b80f64e580232d480cfe34bb0cdd14ac1ba471177bb0098064ad5af48e71f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ22415682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f9699668ce89e59802d26f1ebe6bc78949f7ced29c9af99cd3ce90974cc56c. 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/QZNWW2388542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c8d2b2a05e86e8579800b245da0e867995b6f48da37a2108a1bd6813883527. 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/QZNWW2388549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf538590a56eedbbca1f2081621bc163a9d7480240313dc3133dd9e0cdb82b9d. 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/QZNWW2388550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8dc5cf99615a9b8a8dba351f7f260bff2015e22bfa49551eaec766b23ce398. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZNWW2388538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa962c3706757b68d8311a532bfb83d31d0d9becdfa30a6c1c98b25ce99338e5c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWW2388544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3ea8b9029541d8cc78396ba59b360701987da8cb02b999a0194cf2278c9028. 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/QZNWW2389153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0d381a132860d68cf49e4e60ac5ff22d8258851fc37e36fd7500d1519a8d68. 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/QZNWW2388546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709e8f260087873bdee042fa3337386e5f8c796ea2d76a61af1ce03b1802078e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWW2388548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a1b8c2e94c16a1bd75655f32d68593ffc85905ef72037e76f7f5ca6eeb8840. 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/QZHN92222597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96b0e69a3db44a519e3ff6c4d462e49cfed3e2fb368a6c12dc542a74db438b9. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZHN92222599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f089826daf182216950bda4c345c01a82c0496c258a0590ee192ca640c48a08. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QZHN92222601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c122b5f5c2e90beca5f6d70e80c0ee79553c5235b726fb5c7edbf9711227185. 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/QZHN92560253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c617acdbfb929c84c99ab887ef2ebad8c96cb3b32910f693e8c62d7bdcba6f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA62582605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08060a1182ceb612e0360d70fc02362d92acca8d07cc24e2991d12adf63a296. 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/QZWFT2498273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16adc9eee145754d62d248c5c11ada7772f5206aa4ed871a4ce4d317376f95f. 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/USA2P2425052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eafa08d7b8c4a92e76562890f64068f4ac929bfc95f376c834ed6b876f211e5. 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/QZSYP2410790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d0b0ecf39fe5dbf63b65bf0d2ae6e99ce806ca7a9803f193d7f26688b1c876. 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/QZVEM2390753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff6fd67c90e8e5ca0bb8d19d9c53c4892fd10d12e54b10fc34d040511b58a8a. 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/QZNWV2326198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fb924651e87fc4c26fdae56a134980fe8aaf4352811e6207f99791d5582a8b. 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/QZMER2249023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b0fa7f4bf736cee2b1549a557b375022326bc525a8a0cf9ca682c8c3945bf8. 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/QZHN32254778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a25f0fa13ff74414f1652cdf04d09853d31ef7d15b268ec29af94ddc5604978. 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/QZES92226525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7e1185e9e424352dda35d647d919820237c5eee66b63e8d64845fb5a0e9dee. 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/QZHN52100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4b7a3ccb08731d95303a4195d61239e570ed44386f3a5a5a662de251d47eb6. 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/QZES92132159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91d991d80fc90637d6d3666dcebe7465ab7be65b8327617a6b7a292897b4a99. 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/TCAFA2062573.