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 0x6e3184c12f2c726da2835d8d5b05b16d65cce59174a67a2e5f18c78ebc0da79f. 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/c0137d7b-b574-4be6-92fb-affda885c5d1.json and https://artists.proofprofile.net/proofs/artist/c0137d7b-b574-4be6-92fb-affda885c5d1.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 0xe0d74e6b55326dd2fda9c1d3227233c718a9eee9f4c892713bfda136fe608f45. 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/US23A1501586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82188b0b9e8d2a4b7313717c0e7625807dadc11126e4c302fca6f40867ba58a. 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/US23A1501589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ac6fc64a706aebc5c47fb3870a6ca4b21a0d7eb7ed457e292c82d83e146e54. 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/US23A1501590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff960aaa58d5aef034c09a476bc70dbb7ee5b0326b163d958afa1b5cc50bd912. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US23A1501591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4d8a8215d923d79652ed6096cba94bd6e2ce83e1759e48a9e578cfcf581818. 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/US23A1501592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa703c5e11bffcd54d38a5f8fe2ab9bea47bb2361c6e2595773b0cf620e04bf6a. 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/US23A1501594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e5a741c57f33e5e7bedd8578d8fce19140089302bd84f6acd107e062331d78. 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/US23A1501595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9d0bd62c358341984449104c6ac04b5af510a514b902aa51db7e8618b469c1. 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/US23A1501597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a14df03a387f27d67952aad3adeba9ebdca27aef9a7b821659507bc7a66779. 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/US23A1501599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ff198ee2f509a4d2824c8ddd4e137231b1adfb144a2627f7d1f6c9a7516540. 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/US23A1501600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4027f92fddea71c83d03b8ab6d3420b484df10a6262384c4defe44dcb0e1dfa0. 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/QZTPX2492207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde329374636b0276dee120b0c77f8ce23506f4befdcbbd9e94b3b2f4beadedf4. 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/QM24S1908635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48b2bb749f448a26ce4ac0451d82f9085129c0e5cac48d05448b6f1091cc9c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2541849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5a5dff340fe3bf71d6be42a76587ef2dc6656d84e6bff0bbb64e81bec7c462. 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/QZW9K2403985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288c3f7c9ab3729d2514f87b7105ef42a479a8ff4dc9bbd02849c460503e92f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTVM2466861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0252a16f957e796d1c39ccd06897c8127b2024d5550510038129719811b5f0d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLRD51968326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d53981d75413b6db15e5f5ddce641589bfa59f821caca783a045b824d8664b. 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/NLRD51968327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36d7b64b95ddb7fb2f5324aee685eed1963fe0f366e6b14360e8696a8aa2252. 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/NLRD51968331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761266f79757545f4edf4117f06f5cd807a2f303d0202c34cb2eb854148c9bf2. 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/NLRD51968332.