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 0xfe63fb7f00f6dca561b19bf859d7a6db96f6273277b72f3cc1f124fe1ca54a11. 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/9707e216-74ca-4426-bc71-8ee6a0df91dc.json and https://artists.proofprofile.net/proofs/artist/9707e216-74ca-4426-bc71-8ee6a0df91dc.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 0x4619f603b0345e3251dac595d4f38b4b4e641d9c6f4089cffd420d9237bd4653. 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/USC4R0303990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45251655b879f1992d9f6295fbb78898fe9d1e926085917a524fa0ed9da8844d. 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/USC4R0303991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bccf64abf9b73c79795a55231ee6c84c82524cb7d3144e67f6243208bea6f2. 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/USC4R0303992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f2badc7908d3014680c23b4d93f7684fde86cdf50115ef2c1efd41e35849fb. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USC4R0303993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81508d1e7bb68194b61d636685788a8e3436bcb8acab1edff9e056d82d04bfd. 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/USC4R0303994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8831d36708424850decf3eceb8ccfcf8077e221833609cbd39e373d498115df4. 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/USC4R0303995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046604c7b2809b7914572217e20c88019fefd61d3382c735252eecb47033b81d. 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/USC4R0303996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee3de311c14f55b4b8f90a62453600b54659eccc3d04d11eb6db35445bd51de. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USC4R0303997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6afa6bdf8e54be3fab36f91005dc72796a016ce59fdef5047c4085d1763cb5. 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/USC4R0303999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd492738f034012ef7e792bb2c3f6375b3d8793f5510226b4c593c32c147e620b. 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/USC4R0304454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74254c0d8175e8dc0a9ea00ab016dada17a40721f868d2ec0185ab41aedb1153. 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/USC4R0303131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5ac45aa060121f111d5fbea2c94f780ae30809128db676a872280d8d85d318. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USC4R0303141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90babdf9a96c975b520ae28e1272f8f37cf83da2fee6cf2bf7ea9e9bb78d2906. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USC4R0505933.
Live in St. Louis at the Chesterfield Jazz Festival 2019
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aed549cb4931251ee41682adcd0006145e7b66cb7b8c2e8f5eb2f6bcd9d186. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAFK2122788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9358dedc0ad93aa49fe760dad35910f7b444740135fc0abbb1cbf197335058ff. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TCAFK2122816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bbd97a00f69defb401f3cd7f0f9c51b691544ae681a1d5fa0f05d194e4b622. 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/TCAFK2122818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a68d066e16035fd8b7aa707cb9d35666edb0d60b3c6953bb40fb663625a1aa7. 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/TCAFK2122836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c37c11531af21b7267e50f9acd8a251cd835f71dbf6bf362ea7f3f904faff7d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFK2122884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608ae4986434b664b1efbd7f4ab8795a9dde87fbf92153b94b2353ed4263b474. 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/TCAFK2122905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d3d5377cad2246b2a55a758f771cf9814d882fc0b93f26670d09f74126da5d. 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/TCAFK2122922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c71fe24738a6ce268fa37167434d0c973cf3432d5fbb7a3bce732450da9727a. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/TCAFK2122766.
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 0xcf7e9e769aaad667fb3de1f357231a53a89d676fb18707d3ccbc5d1167b93359. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCAFK2122797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4372fc7bd6e34404e66fb53fc0b65e812d2fa2bfa5f0000f722b895f4ea9289c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAFK2122803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa7608c7f2e6bc311ac166449a8aea2c82a31c03c783f251fd4eebfec28f80f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAFK2122809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b02f36287ce0bdd96e91cc6e44eb8f2e73a609901b599299b887136077bdc3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TCAFK2122913.