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 0x4842228b56710f835096d0e22be73f76b86b7cdac9ce27e2ed684b938d9b7e7e. 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/292c1745-8c7a-43cf-8c07-6eec0b4403b5.json and https://artists.proofprofile.net/proofs/artist/292c1745-8c7a-43cf-8c07-6eec0b4403b5.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 0xd7ab528ba9193c365298c62008125e2d9c0101423d0268dda96c2df1605fdbb1. 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/GBMCZ0601064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18459da84f6f2cd390d1e2b14943e76f44f0852071f1c36fb8cc437afb035821. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/GBMCZ0601065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b6fad23c5484741c5df84c7aaf86115ef9ce7c65ef865a2e5f03ce635c6bbd. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBMCZ0601302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075246e27b0c2b4cd7a6dffb2f28b349bd2ac290934bd844fd50ca33f9f6846f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBMCZ0601604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2747d96cb5ffbb383a4e098ba0a5385d12ab8150882d1bdaaa92990ad6c00b4. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBMCZ0601884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7752ac948da04279f47b9f8846352eb8d32c42bb4b8f2e899e682337d25776. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:53:48Z), 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/GBMCZ0601885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a36e85a4d859408552da257a782f3032f74dee2ff425df3fbf4d177f1b13b5. 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/GBMCZ0601886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48c772d4a08518e16e60fc68aecfa9eed8cae6547a0a94e65d2455a85211435. 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/GBCFU2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6897d01a7708969f66b2433d3c025605a43f86869e0b3c3c5923e0fbeee6ba35. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCFU2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dd4f454cfe768c95102fcd7476e3375dd6bb035846b75e8bfcf1905638a74d. 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/GBCFU2400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1f85b10e9db453e205c5b456d03b8491b1abab36c4f7af90647fa3b2a544e7. 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/GBCFU2400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48c772d4a08518e16e60fc68aecfa9eed8cae6547a0a94e65d2455a85211435. 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/GBCFU2400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a04c63f18c61922e093ee6292691ac408f6af97d7cf437c21bd192cfc348cb. 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/GBCFU2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b86dcf79f22849478a858c3bfa447dad304ebf45d8da5f00d2f318ce702682. 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/GBCFU2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793021fd6c67cfcd9eb2c07032aba81b76002cb210d845a03f02ccc36a6a8458. 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/GBCFU2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076bfd8017dccd8a94f40e562e3389fc825b0d1c6eb676328679786ca48f9a4f. 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/GBCFU2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef34ec7c954586832dddad843d950ace57de3dcc85edca0e29de642ccfb9c62d. 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/GBCFU2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3e962fabddc4f44cb2570ec3413e780b12b6b76c6fa380f8d79a23fcab25d8. 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/GBCFU2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581726d8d3c59d785129d94505463579d640748d1f31725446d8736c26395dd7. 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/GBCFU2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053f4c1a3321715f323b53114e43eb95d831b736b119fa0abe3face19d0bbcf7. 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/GBCFU2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c6c1a67757cfa7ad38ebde0a937123de5213ebd12ddb3c63f3c593900f72ee. 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/GBCFU2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fc00a6ddcb251961b65822569b87e0db26da579247a24b0a3cbe5ef20b4fa9. 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/GBCFU2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa789194ccb565f86658c7dc818b331a2ca588a52f9a972f20662166ec935fc89. 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/GBCFU2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36da879381666373ebd02a3026c838aab5fdc8aa0f7e3fea225ef0ed6d101ae9. 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/GBCFU2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529ce29a5c37cc72c643050f4d5bff615936001ec1ffa243f9a05a01c2444957. 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/GBCFU2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f102282ebe2f05ea6043a3f4c1d39e405f4f4ee075fd9db18acf38a9cb0287. 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/GBCFU2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa752febdb364f88117f849f2f20c84697e27ee969c43a086dc542d2ea0b11a47. 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/GBCFU2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a44d09d9e94e7e7aad3470e9707c081cd72bcaa07302bfed499a682fb32cfb. 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/GBCFU2400101.
Where We Come From (Chicago x London Mixtape)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19feeb45b69b5d3bd6b8f1fab78d272e3ea463009a77fb7124af95c7cca895f1. 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/QM84B1820004.