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 0x05b0ea2c4b6e7ada195d870886f68c54376e3191afaec6ca48fc0d7fa941f5bc. 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/61ada97d-daed-454a-8ba5-39f9390bbf44.json and https://artists.proofprofile.net/proofs/artist/61ada97d-daed-454a-8ba5-39f9390bbf44.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 0x51e8aaba253e2e0bfb45c2943b3daa459f517f0daaf78b2b7b324324afe8c5fc. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZZ7L2430541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206293601cd655f236eefe937c0a0340b2c8411eed1d5dc0fbc4fe88f95aec20. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZZ7M2482138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5996fc0ef37fd58372e8af353f38ec241a0a1eb7e130bd5f0706805d5b4841b9. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZZ7P2413748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a64f14210d9b526019d6a594384178eea9d1339b56b860aec5c1f5de36b31e. 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/QZZ7P2413749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff66f05f4c4c5722b08be6f9cbde1044f327a4d5b157eb8d0744c12faba84723. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7P2413750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98781e05211f52a4a1dccb54ccf7a9396b799b593e11d5b1c26ffa024d3a601c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZZ7P2413751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f505cebe024d56cc4dd5b1c32cd8bda9212ad1878765a9d71cd534c54da77ac. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZZ7P2413752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffc4561e344fea108987967a611224c3ed4d64edd4a95c8575f0c7a34947f9b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7P2413753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bf384fdf0c2d8a5f3f537c01f33a9763cd669fa286e56f7f053360a36a7da2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZZ7P2413754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f1d65d090f38129dc9f250332126b858f11656be7a4a23875d7dd0f1d7edf2. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZZ7P2413756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0b2b6457dbd02e16f77b90fd22d19ab13599f95410476d0998968a607f0dcd. 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/QZZ7P2413757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e53ac949f6dfa4827b0a38862750553675eb39b3298c92ff3b1beabb3497985. 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/QZZ7T2438848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5513fd52033b41b01eb9fd702f02e6081170b57bad717b0d00dcc885f8175139. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZZ7T2438852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbc2f7fe84fb313bc6ddd3d28b734324b17d86fd834f226d1cb198e07534e5f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ7V2492945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b7bc274559af03a8b6a1bc0c6c62dcda76fbd7e7e2c575abe78ebc9327d99c. 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/QZZ7P2413732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3f93d397895e059d1a2b7a74e72ef591125eb32e4fff944c1bd90a6d456617. 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/QZZ7P2413733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78419b439397fa0d1f192572da2be6ae5700a50a4f58d470470f17a71f8ff88. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ7V2492946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d32f48e62faa47bd6b4abc78818399977decd747d82b8b718c42721f7d8980. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ7V2492947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853ca4ff4f0e86d8c877d00786182328cdb70007280900b3a17959829b24a2d8. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZZ7V2492948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219c7c90e7eb5d28d82cce8763e332a55a3e445e971c6fee8f2c4af8f34cc390. 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/QZZ7V2492952.