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 0x4b7342c2d9136c4e717dc3bbb4df2eadd784f599dd0d2ab08506a392e3b2b2fb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17ea090f-1d1c-41ff-b366-9ce59aa39c26.json and https://artists.proofprofile.net/proofs/artist/17ea090f-1d1c-41ff-b366-9ce59aa39c26.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 0x9a1d65bece87508322f00e6a746f5828a21393532e07ca2c9db9c8f3752bfbaa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEE861600483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62025f1b9ac28089e9bffb10ee5f1159f020e2a0ea39511b258a18d34e2cdebc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NOXB61504010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c74fa638a57f7fee6d6ab0ba3904b4f473a5cf0e7bbaeb0ab23c98fe194b437. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:39:38Z), 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/DEE861600562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6560f09a0404c1ca427f53d308cd2e74b0c297b13de60671170508f32f6aa1fd. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/DEE861701184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65253ad8eed77d332fa59483b422700712b57c7d8718cdf4088eb2a266495f27. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEE861900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838d48b1ed1c78b56f549b71051acd4d42813d56d6d47863c080b5f7139cd2e4. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DEE861901368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de2a0b360f8efc8050f42f1f61dacb028a88103db357d52051cb197659aa0eb. 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/DEE861901371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399e0f60e78188d76635fba9b15fcb76bd95841e076e2ad5b959188f5428367c. 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/DEE861903682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340e8ed8576b5174b7c29a49a32b380bec6349ab8d4524e3beb0b2f71c2800a6. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/NOAAC2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6df1fe1ee115fe3c7cd2c7dedb1964b2ec23b89ab54addf93292b1dfc90ff2d. 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/NOAAC2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da6ce7f3db1d151dc1c1939edac55c9a808d12211d3b80a187736c2ab88a7da. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/NOAAC2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b826592ccb543679a5cc6f926021689d809374a037b1614df8f348260e9857. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/NOAAC2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8172ebd2567bd4bc0342c2ce9585815b89d6c6961813d1d5933be17e66182f. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/NOAAC2000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664d992c66de924228120b1a067b9915de8b9b0f4ef303ca5b6d49088af7409d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/NOXGZ2301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ca3730c6a626328fb13c8060fbbe1d563d3f21935e54947884c801fd569ea6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOAGW2100031.