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 0xa79b76674ad497e66b7593ab0860ca5fb0f0128b7ad3f8ac29be91d11a346360. 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/47c545e1-0464-427b-81e4-db50d814ddaf.json and https://artists.proofprofile.net/proofs/artist/47c545e1-0464-427b-81e4-db50d814ddaf.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 0x58dae65fba2d588a2975a601f6fc8b0e6542921c260971ceb174b2588ebf5c3c. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TCJPS2245810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16753599e255589f3485d61546bd55fa7b44cf835fcca8aa4e0af09521da0649. 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/TCJPS2245913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9572a3e805072a1afd904c3899e6ffe5063ce000d302b1c53fadfe2f0a6b5469. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCJPU2231133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9572a3e805072a1afd904c3899e6ffe5063ce000d302b1c53fadfe2f0a6b5469. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCJPU2231133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76166a49c82aac68ea2201a35ce94fe744c0168f4ffe73f28ebd468636c00765. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/TCJPV2392943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd9a6ada3f2bda18a4b3c1226ab20d751c5940f2f7100ddb1edd1e93af972cb. 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/TCJPX2317412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6b1420ed1aa48f642d0e2610560a5f042cf616ddb084ea142fdb9ea883d824. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCJPY2321721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee618a2adb5aeae7d6271d9c6b4e5368f57ecef9134b382a42792bb6b5310b00. 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/TCJPY2321727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd232a6842992f7e97acf6df4f90ed54c7013905d6a1dec94e9475b3ae0927ca9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPA2458900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d9ad9cf32d2cf8011f69faa94ca991806740055d8c0e2a04408326c7a0a5fe. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCJPB2467820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fea0be3ef1be1dcd5f5f6506a3b22190f82fad3e1412535bb429216a6bc9944. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCJPB2467832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3c47812ca9c4cfa571d73ab2bc563502cd46e55ce0d451ea29ac2cdfa56667. 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/TCJPB2467835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13767b20a7492fbd88c22b1616e1b47bc5112d9baaad9629fc9334d8e7ed27db. 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/TCJPB2467853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42819230c33538557cc7659c45416403aab255197bf508f87c177f75d8e36bb9. 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/TCJPB2467786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13767b20a7492fbd88c22b1616e1b47bc5112d9baaad9629fc9334d8e7ed27db. 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/TCJPB2467853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4411a861bd254d845cf65476f220429081cdc6290a85f0c57522d8f2b637ec. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCJPB2491518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2a1c4a6d15e6ae9fe6eee01fbf497353fc718006446c530d7830c4406e49ae. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPD2429354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7c33702de96cd47de5f2ec9902de0a8c78c7f5d7b9c5bfc5368a440c3e2257. 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/TCJPD2560779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea98def08cf05ad675918da78073e0ec60386db684ac6c66c9301c7511fa5d9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPD2592715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c17e07e0f83e1b7d9143cc101fdca5a86be47e4686d319b3de20142d0d14536. 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/TCJPD2592699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d390f1c613da83f60dedc0d3f94953c15acb1199bb9f865ce9d85acce2ec3f7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCJPJ2519863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe44ab6ff7dbf54315771fcd925864051e03f2a6654e5853d11ecf087d1b23d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPJ2527512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7aacfa1831337496260338ef75b75a7b79b4cb74bd8b30ffe0b2bb77e81bb2e. 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/TCJPJ2540598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ecab0c1886c0929e7a197d24dc4607b17b5304e5a61a1dec4d093a5e66cd45. 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/JP92N2536169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e8e7ca6d5a2b938bbc97fc4dd73ae90c9c294cd72e022c06a25fd716005b57. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QT66J2548901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19c8d8a329d65e0100f4d929b7e1c5aad0876b63ca4409357b0487a2c421800. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QT66K2509149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc870ce28ef8485617774caef377e94b561ae283a0da32f2abfc7b4dd804afd. 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/QT66K2509171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56108bde9355b5ffce1e8576c0ddf31c001bb038c9d10a7f39aa04fc5b7b872. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QT66K2509242.