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 0xd788d52df2be17d10ef4a0773bb2c235d029008b9f95d1714d9500fc6e3722b5. 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/d6559fdc-7b17-4800-b1a7-e1c0927397f1.json and https://artists.proofprofile.net/proofs/artist/d6559fdc-7b17-4800-b1a7-e1c0927397f1.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 0x371a2aacaac3e601a9d3faf5a32904451d4d9841d3c89ae97a250db942ff9087. 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/GB6ZW2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fa7206e186a50c7f4418276116defe35c9d6e64f6baf96744c5cce91e1994f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB6ZW2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493f8953dad97b52ba40847eb6d19350f04f2eb8d86b8c10bf0cbf3734a084e3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GB6ZW2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d4bfd56a94703529585860631be4cc470d0b9b659577047e52d3746f6b305c. 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/GB6ZW2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08f14c93107d12a8152c0b66ecdadab05d8b1f49ffacda4e9c69601c3908d89. 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/GB6ZW2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb640e56bf11abb935054f9db8d3e10a97ff80c620efefcb9a2f9c197dd4f7522. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GB6ZW2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f6159b0814e48be886847d2ecef7322c1fc377fcab725aa7c0b5d456c6a567. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GB6ZW2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e16d4a2112011d5450005d22218d64331eec59077044c2d95f3ff2254eb27ae. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GB6ZW2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc143c69d58b578bc5bb93420de60c0024b9c622a8c47c88119d03f4f873081. 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/GB6ZW2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3065c4e5fcad4e643fcb73e897d18c833e0f7b77b6ce5bfab8a98aeaa430b1ad. 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/GB6ZW2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa092f605596f44912fbb20fc5e6f45c3975908026fb283f4f7c19ec555ce786d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GB6ZW2100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d013aeb47fd910fc7aa7da42ebfafa9b72c965a66a0d69d42e5240923ecc84. 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/GB6ZW2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0da00f1f87db9653013f7278265d4d49181d89236f7b3384aa536ba2b32193. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GB6ZW2100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf694b9d8131494a11ecb2b4eb449b7b088fdd4466092ec1aa00e7f51a3051bf9. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GB6ZW2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c7166e949393b6f3a019ec122c1a8549bba9265ba65337d997832a9646c4f6. 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/FR96X2342878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2325d821a328bc9b5aa2f5f2050cb4c1c39306de19ae8c8baff4471dd94aa49b. 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/FR96X2342875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411b94c3a5527723d7ace0c450b87c93fd1ef26ab12032ab2d34b6233c3cae07. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR96X2342876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a2662d94691739a8f298379646cda1aa95bc5fe0ea1f0c5387e7386a83b730. 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/FR96X2342877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c7166e949393b6f3a019ec122c1a8549bba9265ba65337d997832a9646c4f6. 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/FR96X2342878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3cc19216576f9b3a07ba6c0605eed68bb471965b8b1aee8a4c37e784806db8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR96X2342879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44d6b00c682c232dca76e12a5c51fed17e9db4d48be8fe5b20ea90c092c4a0d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR96X2342880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9866d4d41ceb53ac6d35029f845049ed0fd518f095d860564d18ec22369be6ad. 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/FR96X2342883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebff84c95a66d51e3f277a854e68fbac8853f676f2af8077386ba97739a38fa0. 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/FR96X2342887.