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 0xfc510e5a956d1b7c0a6cdcbe3080f4eda65b391568587a9aed5e732eec774afe. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01a24dae-c929-4adb-a3e8-54305cc4f838.json and https://artists.proofprofile.net/proofs/artist/01a24dae-c929-4adb-a3e8-54305cc4f838.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 0xad765affd8972f48e8041784b70abddbe8c2d395d9f3a8e4ba0d41c9144afacd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHN2365272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8f34408ce96501ea678f021f7b562034c1f32842b74feb6944b7e47c5bdd7a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIW2473044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a97098b92dc29ead1e9620530130c582dd5ab18dfb9978b31f3490e9c89b1a. 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/TCAIW2473560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9fba8041023cb4bd34ae0a08fd3c2939fcf98c90d1cbcce7f1a9912ad5cbfa. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAJE2505332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a97098b92dc29ead1e9620530130c582dd5ab18dfb9978b31f3490e9c89b1a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAIW2473560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905b56cea83c02d8e5c620e862b303cb824813637bd476557a1c28bc4f85b050. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJE2505490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38622b245b3456165f11e8dcdc99e698c9af12e4ad53941bcc1829d46f25aeeb. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAJE2505521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8f34408ce96501ea678f021f7b562034c1f32842b74feb6944b7e47c5bdd7a. 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/TCAIW2473044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ba72e21b3e27c383a945d7eef1d67dca5cae66beccfaf79716409b09d923dc. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAJE2505553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e3895db177bd073784c1d39d6e6cbd6f13264a4a7249d41a6cfda6bc8c3ea9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAJE2505566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f54d1671cf7c9647177766a9f849f5ae45f6ddf50eb6c643db40200c394f29. 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/TCAJE2505610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8716512783696fe98e4424b9e848574be22d14eb07f9223ce3854bf0236a5bac. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/AUQQM2000001.
Precious Energy - Homage to Leon Thomas and Pharoah Sanders
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc3a52ddc9912475a4a16e05379649e0720013ab0291692ae6cfc9353a100a5. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/AUBNM1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404e0be444eef15ee367a3904084c7ac30499806b863337c978ceea7c134dd51. 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/AUBNM1900124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc8006d278fe94b41dfb74d9158189462766b720faf8ad3b8fdc1f008e1d260. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/AUBNM1900127.
Sweet Sweet Spirit - Homage to Doris Akers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4eb036e2a7410656cd88dd6ee2240d94b3900a4ac43ffff5b039f6b7389a8a. 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/AUBNM1900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc3a52ddc9912475a4a16e05379649e0720013ab0291692ae6cfc9353a100a5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/AUBNM1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf0f4b9cc30e4b39443b88d2dbb4fbd0dbb341dd49195ad16a511e1b9e9a5f2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEG932202304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8716512783696fe98e4424b9e848574be22d14eb07f9223ce3854bf0236a5bac. 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/AUQQM2000001.