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 0x6075d32efda2fee11710fd3ade1561317372f13b59e824b6a7ffbe6b053c50b9. 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/34627326-7830-4a35-8f30-3b57534bead4.json and https://artists.proofprofile.net/proofs/artist/34627326-7830-4a35-8f30-3b57534bead4.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 0x876287deb3e15bd9e73721af728aa7170c2195a85a1eb74b134e4d95841c4cd9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBQ2F1561307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca379ce81ff40be81aa915fdeb4494fd682136d981887396c1d4cb66f57187b. 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/GBLV61718721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5aa47bf265aa20d12d7baab320b2d1bcc030be1d9543b100c2dff67de9416d. 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/USLZJ1905117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7414d3188a4e326f4a920a5daf846e0e9868267a4c584115190264c039940bb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ITA061302001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b67c0c8a8a7060bd283a2055c4f0887cf3daade8199bfebc3d8204782837b1. 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/GBKQU2297297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5513fb0af1d7b0479d0b159be3454d0bca297bd175275d5147290365fd7a22d9. 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/GBNUQ2300734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf1b293b6937316d80b57a395a31814dda8f942f07ee578e11692a098a837cd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBKQU2320681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb797669a1471b0ca8437bac5e48e440f64496b567e7da7ee4acfdbd1207e09d. 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/DEX042300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9323b27684f2264a5be1a840224ca06815d9858bac38193377ffd4f1ed8371. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DEX042300030.
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 0x92e4b20aa2cd102d52a31a1f8fc22728e353de9b8d0e092627e65bb4788bfad4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:19Z), 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/GBKQU2426252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d297702e52be2a40ba26f3e7762403684cb3ceb7ef67571c505a32bb45dded. 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/GBSCL2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9700d5285d09a539a8e6a2d0f8cab245259d90e9b6ac1088e9748dd7d3b0d1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GBK6Y2423801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b139a6ccdaa91e78825df81a32681ac4b155857ddc0d2e622e3898e68bf4e8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBK6Y2423803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0410383fa6be0b85a89d265a6fbc04b6e24d16464e04d5a5993a8ff5887dc30. 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/GBK6Y2423804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bac9c0e6c15e541a1f811f1b33ffd19e63fc944c3761b096b49f0d2a380ec3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKQU2490837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330028d9d3bd673ffda6d376d68fed61f97e9eb52528925affa18b01e544272b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:48:23Z), 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/BK4DA2453588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa879c8f1db2f2e789c7c749ff1858b983ea18d8931c2a28370ef444a9740e689. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:42:40Z), 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/ES94G2425605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382b7641c5b495d699c892522d93c25b862e8980e28b5b88cefb311aac142d36. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/GBKQU2515914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdf7b5aeb3c5b070a153b522fb49a5176c166e386982b62cc6cfe664da3a5a5. 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/GBKQU2555649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a40a800bd3648376fd4792e6bfaff059b00d75112f657a1be1717ba650b73b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:15Z), 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/USA2P2531690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5dba79fac64a0365511132f6498f01800eb440ac60c0dd3fe4c69e72bdc67f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:03:55Z), 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/GBJAJ2500961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46cecf98562bef89beb289ba315a2621a7b3bb4a7c6c39d4347833385f69a8a. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/BX0BA2500111.
Toolroom Radio EP745 - Presented by Mark Knight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6093ce9cc46619bfa507d47f94d47322dbdfc8e4e5412b82a0f26b0e0ee45fb. 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/GBJAJ2400966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a506d77768c8ec15a540dd1eef9322f5639fdeb33f1fd98887956c3852946a0. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US83Z2322179.