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 0x85cdfd90047920297d731b7e65ec921605f84a4c451423fc42e007ae74a1ac5c. 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/2c1e6fc1-7222-45d8-b5c4-79433bb48235.json and https://artists.proofprofile.net/proofs/artist/2c1e6fc1-7222-45d8-b5c4-79433bb48235.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 0x583ae86493c17c3215dd20a4a32d32fd6cdc8e5986da02aeff4fb6d05fafe8b9. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/BXTB11900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc9dd9676e5c8187061bbe016bf84661c88c531204f4db40ee6a87abe7fe0ad. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/BXTB11900186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1597bf3025a4197bf1d3b70bc87519a07def47741e5c31f6d838935027bec91. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BXTB11900187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3075fb692add890aa2c781474d677cafbb0a2bad33d1079b5d18b71de1b96f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BXTB11900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfde8da5575773bfeaf6ee899b4fc678e86cbcb4531c9599a5280b33c282c0ca. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BXTB11900190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83905e418d29913f313f1a2a6b85384bafeac278480116c11dfb74c19a6cff35. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BXTB12000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8bd25f419c7be7aa1cb6453ee5ee98bea75267b3e93338ff6df3096673b2db. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCSUY2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fa0f5de981ea0d05893eba85bc6bd401bcbacfd26030016404d978ed10cc12. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BCSUY2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f38ac250e8bf76bd9b9a4ea4f827f975e37a4d64d71f4a579d4a45089d62fbc. 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/BCSUY2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9210feff5a18ece3b011aeab826525777737858287cacbd17ad210c59ab4c2c0. 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/BCJ0X2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ead421169af662af1f31e67fbb863a585a7669d427ed168e37a40fafd6ce1e0. 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/QZNJV2246887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0b00f7bd78d66aa8e05e0f7a4172d94d361f51d3977e0793f87b7fb5216316. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZNJW2246105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d80ff6b30a61e12a8faa9b4e07eb6251cd9991ba8474e791921a4c3e475b67f. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BC0MF2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a68b735f99d37b2761577b16fac9b21209d86c3c306e1bf02af64a8c23111d0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BX52E2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99c6807b55cc85adfcccfa19750939b400b96657588be79a690ea56e8147fe3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BX52E2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca68c9029209bfd47c4241e6a27119b57d7dccdb10007d6579fb91cc162bb412. 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/BXSSW2400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d647ca9a700b096f874cd9bded84ae017e334c2a7e3b2b0b79fd8362b963f4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXSSW2400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df20cc155172f091d52ac65a66a40b582bd6cb48adbc63efc79f9bf1d88bd91. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BX52E2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4573c533334850a037b034592788f9f401784c9433ef0e5977aa65761c15e7ad. 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/BX52E2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52197bc9e4454ae572a32fac31dbab30182227073571a8bcfa513ba22f6d057b. 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/BX52E2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a68b735f99d37b2761577b16fac9b21209d86c3c306e1bf02af64a8c23111d0. 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/BX52E2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa520ddd5fd60eb6a222cc8a150f31b71470f1dc0338dbc89205331df074c54b2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BX52E2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f1fec33a68d0371bdf6dd9421ab6393aedfcbabc3d27b7db3cd37c776ece41. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX52E2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479c21b14258655641782f7ab378f54782b8604a5aca6dc1f28911464e7feca7. 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/BX52E2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba05571feba845bdf48532dc7596606f08315227936b0bcaf0d81bd93311737. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BX52E2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6f92b9d1930dd311834f57602057d18d4c632c06b460d02ff3bd6df77307a8. 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/BX52E2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe20d97d913173c61736d44d3b5f69b5115ecd0f161f3ba3292fb074718317b. 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/BRUM72302170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cba8cf2ca6dfa6caa52b94040e00ad46f53a89b12de60da7f35a5603972dee. 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/BXTB12000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f0d610e6eb7e838ef9e88d1c2a0a15ca170aaa193997c153c3597ef2c6d49c. 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/QZGLS2095711.