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 0x8231b1a4b6b04b874129b8590cbb807575740840cecf4015e28a9a7315189433. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73568843-90e0-4d1d-82cf-a727cea51cd3.json and https://artists.proofprofile.net/proofs/artist/73568843-90e0-4d1d-82cf-a727cea51cd3.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 0x0870b9d5fe6bfe88959131908bef08cae44e77f19e3c95c86767c0a0e1283912. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZWFV2419260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdbf031b7b6a900ca2923c6f43eebae42f276fea70d1e5b35025f42306073d6. 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/QZZ792405184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdbf031b7b6a900ca2923c6f43eebae42f276fea70d1e5b35025f42306073d6. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZZ792405184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd23a7832e8736eb26c9f42135fa4b32e2bdb444db2c19ad56481abb5e0e0ce2. 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/QZWFN2478847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5149cc0ced2951c1fe8e19986253c6b003d03028be2527d3769e307700d9b309. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QT3F42429199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c59389d1ab1514027b875876a002e2f581b93c8dd5256253c657aeea1765077. 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/QZZ7V2439723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdbf031b7b6a900ca2923c6f43eebae42f276fea70d1e5b35025f42306073d6. Chain 2 (Bitcoin): anchored in block 958749 (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/QZZ792405184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0870b9d5fe6bfe88959131908bef08cae44e77f19e3c95c86767c0a0e1283912. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:08:59Z), 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/QZWFV2419260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd23a7832e8736eb26c9f42135fa4b32e2bdb444db2c19ad56481abb5e0e0ce2. 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/QZWFN2478847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9782d3e0d9d03132efed31059b6e19f4622cb309bda6f064e225a633bd585c79. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZDA52534538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd23a7832e8736eb26c9f42135fa4b32e2bdb444db2c19ad56481abb5e0e0ce2. 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/QZWFN2478847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdbf031b7b6a900ca2923c6f43eebae42f276fea70d1e5b35025f42306073d6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZZ792405184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c59389d1ab1514027b875876a002e2f581b93c8dd5256253c657aeea1765077. 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/QZZ7V2439723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0870b9d5fe6bfe88959131908bef08cae44e77f19e3c95c86767c0a0e1283912. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:47Z), 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/QZWFV2419260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9782d3e0d9d03132efed31059b6e19f4622cb309bda6f064e225a633bd585c79. 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/QZDA52534538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5202fbb6af377d4835fa3037b9431b3997c53872d55e339c9fb7b8fb851a4fad. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6P2579965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87f2ecec5ebd2798fe67daec6b521daa35c10ac13cd43dad01a33a3b117f342. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6P2579966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6ecc87fb9243f26e3496ae191373a1d8af78599aff8ff741e2491bc7f4e1a2. 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/QZK6P2579967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088ffac5abfb8604ed1b2d03c6f0afb7e2e365489584f945c881ff510f529dea. 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/QZK6P2579968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdbf031b7b6a900ca2923c6f43eebae42f276fea70d1e5b35025f42306073d6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZZ792405184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c59389d1ab1514027b875876a002e2f581b93c8dd5256253c657aeea1765077. 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/QZZ7V2439723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0870b9d5fe6bfe88959131908bef08cae44e77f19e3c95c86767c0a0e1283912. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZWFV2419260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9782d3e0d9d03132efed31059b6e19f4622cb309bda6f064e225a633bd585c79. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZDA52534538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5149cc0ced2951c1fe8e19986253c6b003d03028be2527d3769e307700d9b309. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:55:10Z), 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/QT3F42429199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5202fbb6af377d4835fa3037b9431b3997c53872d55e339c9fb7b8fb851a4fad. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:10:10Z), 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/QZK6P2579965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6ecc87fb9243f26e3496ae191373a1d8af78599aff8ff741e2491bc7f4e1a2. 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/QZK6P2579967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb16ef3c0cc753d9c3a4fbe5db892aa126486a9321bbd025073dca052f7978d8. 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/QZTAW2524163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a17965e49019c84b641f07e17ce10658b1a4c08571668a8078f1c037f75d93b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:56:07Z), 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/QZTB52591034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3905211fc1b66d5faa605744ee40ac17ce3e65f858393e2400d80b9a78c6dcad. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFM2532915.