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 0x4ed2864823f66e8e04d24af3bfd5012c457e3885c0c6354bbe70a80275b9419e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a7cb474-a026-4425-a25e-c7787d5f5e95.json and https://artists.proofprofile.net/proofs/artist/6a7cb474-a026-4425-a25e-c7787d5f5e95.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 0x4b3420f94422b12b817f66e6909095d52194b0605efc6e5d6f1696011ba76287. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBSMU1877568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8396c2a5b143db85c04968a983ef296afee3c1e8ddb71cb20007a23bcf438e3. 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/GBSMU1877569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f6b65ef040a63dab1370ae5970830ca0e5e3cbb9a785ba34f2002692ad7dd6. 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/GBSMU1877571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25483595c9079bef37e0a8c10cdfa46eb60f061843089513ea5cafcd1c21363e. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/GBSMU1877572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cb5db43476e7b1e68c135402d76a5e9966979720e6bba7aa74f86fbbb5f1b0. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:16:46Z), 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/GBSMU1877575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5512fa282e7263c4abca48cfd9a1924f4ecac36f51e42c0bf223858b26f6602a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ2YP1915301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977127fa5aa2f8e643c3c76ff30173734b49ab8ce10dd4731b04abf3fd3c2266. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ2YP1915302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88a59048da7681d4a1b0db90f969bcea7e40182a465a5e4155d7f05d04aed64. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:03Z), 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/QZ2YP1915303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25ce74c7f197c5ffbbc02bdf63ea784854f660ac1d138b114fa744da3fddb2a. 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/QZ2YP1915306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07112012a9f709e40e470785a77cb9304c4dcc75571df1e78e1246c66ac8078. 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/QZ2YP1915311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3075796bfb70926a4a1e3afa867cb45c57f65910086e7b597b296091ef13b30. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/QZ2YP2016501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edc732c1add4de32cd5783dc71e14352cc1ac8c8479153cc8dc9851f0e66a53. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:11:16Z), 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/QZ2YP2016502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b56f6e5e2cb1febedb0d3b8b92cd3bff037122cb90fdd2413e5a2db8aacee2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:30:13Z), 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/QZ2YP2016503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b1aad1bd95f5ee11ffd65c5e82071214135dedcccf47f8163f265c6ee67406. 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/QZ2YP2016504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf581150f8d387d098ee58aad310d2d55c25f303732fc62a48cb8d181d85587. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:03:45Z), 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/QZ2YP2016505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb718554be39fbbef0a8583fc9fbf73a9f3654a4e268c3614be11f0a126a4d1df. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:27Z), 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/QZ2YP2016506.