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 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 0x343d608cfde6a3727f338486034d248602dd27f244e5a56dd7fb557c8905ab42. 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/e6a02585-9821-4498-8eed-ef133c688747.json and https://artists.proofprofile.net/proofs/artist/e6a02585-9821-4498-8eed-ef133c688747.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 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 0x2e49d54b36624684ff9cc6550c40648aaceeddcadbb3a38833fcb430b909d5cc. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/NOPDA5813010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b77953b46b61f24883661db6d542ca761ac1cc1f1c5ffcf143304f435a156b0. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/NOPDA5813050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4ced16e2e6db620f2d61e74cce4282ece408b67e057ec7e6e1f316b3da6527. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/NOPDA5813110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b21be5708a0cc82d54ac8329ae07e4d00479a5dca1b6b259e80e5b31b47cee. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/NO2T73001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a0f32210a8de75cd9d6dc61193a5d8e5f9a7f58a2c4a3d941c924692553f72. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NO2T73001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d877d1c225a48b0ffc75d44de88479464cfd4f75ea0effd7bdaa6e66bf62c38. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NO2T73001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2a8c9185dc47cc7c3bff18ab4ea67ff5bb7b388f382c3489372f1813fa53e5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NO2T73001050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c70f2103b9b2e08d461c1d0743fac67ce8cad4584a7972b688c1e85f085793. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NO2T71901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55125c92a32428bef3e59d5647032dd22d7d386652c1140551130078eac90df0. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NO2T71901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42abdfe3325f6759463370516e309452e513a98d5ffe6b62b930c1114ea35711. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NO2T71901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b78dc2e4d16ce3ca26c9a6a20c9f64219af14a7e49d6bc954647b7c876f43e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NO2T71901080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe845337feab2c0cc628b07517e07db5afe31d344860f82b532968e7d5d27ed. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/NO2T71902040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66659b0f7f7622170c40dacb1d059eec903840ba08df9aadbfe9c7e4670911cb. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NO2T72501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa6159334caedb4120b09f8b2f23ccd0ecbc5ec47e642b1a55b2a739100964b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NO2T72501060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05d255618917544be2f48284d2c4a7ff1a87a169f69330609ed3a84862682d1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NO2T72501070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a8a6c10227b9283f28cb79e6a94064bd24466fff8bd479c6d74c0098d05ed9. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/NO2T72501080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7b2742894812dae0802517690eb88faab67cf6298a68190627e6142f914047. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NO2T72601010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3f572f9caed52cff6516cbd67f230b17c929939afa14dd78587cf69d560812. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/NO2T72601020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeeb291dcdf2110455639da47adf2294544bea81010d0aa157d367f500a8fa8d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/NO2T72601030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107a8da67465a001b987a7d2100edc6f1ad4332ee56c96ced37bd1ae875d1575. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMBZ92001080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6695f0a42b01d09a3c77de1be17a2b1b5b4be5fc2f5cb9b1aa13bdda3a04d02c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TW2492674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cba2fd327a1bd57eabfa7703a2d2c058c50b42c6428bd583154eebc64b7bf6a. 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/QM4TW2492683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261bc5b9cfa5dc782b52d45b5483588a4da4d535702ec2a4708ddf0b8f056414. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QM4TW2492688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646a286c8b1ee44a3b5278109dac87d1d556691b40fc059faf951a7c11be4dd3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QM4TW2492691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266828e53eebf3afc82c7448ac3db6684c28c7de560efb6b72651f90f578d046. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM4TW2492701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed34b74e0f8ce0bf2025b70b61dbfe2dfbaaa26835c3d303dbcda06f9761a9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM4TW2492704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5996ec40b5d217bdb0c07f28c187b40c48e59c063eddaa195fe987a67c10b4d6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM4TW2492796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20afd1e97a609085b7be738374c8d219b6c08e8380357ef3f3224163535d5683. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QM4TW2492811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ad719f11e04693843ceac3810b09a43c24dc8d6be5ee5883301913787186dd. 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/QM4TW2492815.