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 0x27e7f42a36e6ed824ffb73f64e46926bc4afc84b8fca3f1b7a9401e3eb80fe2b. 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/2af261ae-975c-4e98-9de7-a6a2c05811f9.json and https://artists.proofprofile.net/proofs/artist/2af261ae-975c-4e98-9de7-a6a2c05811f9.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 0xfedd6e99b28b228d3a09ebc25e234e864fd857b5515661860013fd1decef9655. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:55:15Z), 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/QZMEN2175457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a2655e5df867e922c897e48c4d952f5f9c464a05ae82c727ff707a459367d6. 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/QZTAT2160273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2db09596e2bd9186c7c27557bc0f4574a09be152c8f89214d1f2fdc6d7bd72. 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/CA5KR2239977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a7daeddd7fea6280954fd72022a99a5bba6ce27343cbc41d2f906cb2b2e2d3. 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/QZPLR2218520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aacf7ff6d1af3a26bcaa6576755dc65e523539d5d573ab6935196c351c85c90. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:57Z), 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/QZPLR2218522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bc4f2d91e0bc6ad62359387b22ae924a9d94e6a35d1adf8b7eb36679a8dc74. 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/DGA062309497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bc4f2d91e0bc6ad62359387b22ae924a9d94e6a35d1adf8b7eb36679a8dc74. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DGA062309497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32886f7846d269566dcf192692649a0c8fd456ac45084b2310299457c8d9e481. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DGA052367080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a82017133f955ca2a7d6003004744215bdf4bc0e55294e1edd709e352c432f6. 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/DGA0P2325491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94b532fa014ece98bab9f7335c263f54955bd578b574e98c52086d0ba65663a. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DGA062309499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccaa772181d81a110599f76f66dad4962cf5005ab8845212bbb18edf6e8461f7. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/CBAUX2411903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a496bcee27f79c19cb74ac16b6b84c22cc2b213f5093dd5e8b05c7f0b20a7b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAQJX2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999a6897059a2dd80812bc651fa558e5cc78fa70cb0492b161ff6446f384f9e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM3DF2248645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ee59cbfb5d9cbce744236821a5777363b3ce63f61c79b8375859569f12c3b8. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBEWA2400374.
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 0xa7a9dc61eeaf5afe103daa7a5d737ba97d6c01828f227154899b4726ea870e5c. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZGWX2209935.