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 0xdb9c1a83462ee43a88cacb2eb1db1710494c10ae0868dea6aebd25b4dde2ffa6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afb59b2e-4412-4354-81a1-bdf49ea47ae3.json and https://artists.proofprofile.net/proofs/artist/afb59b2e-4412-4354-81a1-bdf49ea47ae3.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 0x8c454c1e4ef87b09ee18cf44434e2cda5d6a548b2d00f6dcae4c7c691b592412. 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/NOJRA5813140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fae91ad064b1a376285a00b0071a27c7d00995a1383d3d057faa2c14410c7ee. 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/NOJRA0408100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f304f4ca48bbb5585759bbb0c5dce7ae7e4bb3092200aead0ea68b96f93a30. 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/NOX9X3115004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e63d815e874aee507b2e87d755baf3ceffdc22beeea2063e508235945ac3023. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NOX9X3115005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a849d97512d7ba0da7d6860e30cf925321d1d9e2e307938636d680c2463f050. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:47:23Z), 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/NOX9X3115006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20de9b6c45682ddf429848dd02d52db9a6a887a83aa1840a460f510ee824fa70. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NOX9X3115009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c496ebdaa834adfd8a1f23ec00b63e63270e5e4d222c1d4e824b4fda0677fd7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCABP1370289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9003033f30bc4199ca4e49113e28ad287739efb09e61e0204ddf3d1be76aa8e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:15Z), 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/TCAEB1988073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892ffebd47bc3e393aff9722fb00ab0bf492778a3d1413f5a3dd9af6431ac95c. 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/SEVLW2311006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a98353b2da8d07954dde4a5d6372c22323ea4f9b268e55029bb505d1e7d211. 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/QMDA71596744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce8306efbf9639b70e1582e77a4322b50e8bc281deaa643d7caae61270d62a2. 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/SEVLW2309004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9f53c6f2df76f916f3e92f58018bd9cee1055f232e91fa8e94902256ad9b73. 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/QM6MZ2125565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4063a8cab6c3dbe4552761697e0b3f5f76105fda5d14c8baa9a0abe66878a9b7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NOJRA0212120.
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 0x5cc6ec6be00b1b68b5dd91362b5a4c75aabe9828d70c04c7062be6fe7d8a7473. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/SEVLW2311011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19355ded8ca774259a8b6f736ecf5e75cad3e7b770dba4096164344c00bedc9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/NOJRA0212040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e7d4146e3a40d10ce386a3f5ff14045251f1e8303c7635fc3932ad8990faa2. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NOJRA0212140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db207767c8b91ae8af74fb088aa63daf5194e139cf6da83b7c6dc379109779f. 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/NOJRA0715090.