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 0x95d930547cc6ebd069dc813b193990fa093694eee71d04dae5e9ea096c0e0ba2. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1278b9f1-55ca-4275-902d-5c94f20b18b3.json and https://artists.proofprofile.net/proofs/artist/1278b9f1-55ca-4275-902d-5c94f20b18b3.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 0xd66b990778c6c090ec89e53cc6b22e77b04d2405bdbd6463cdff2e3e1db5cfa6. 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/BRAPI0302084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0ae60008c0b519597ada3dba5916a2375f1fd4533f9931b20d6f6c0b414159. 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/BRAPI0100392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d27922d49c92a60c77cc00cf4eedb53d94cde602e8c2752601a9e44e9160922. 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/BRAPI0302087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc294a03d3b3ea17cc48b54d70d401fe07e47a339a3bf85b03017e1860571917. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BRAPI0302088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f19dd97d606dfe7c622b268e9043e43f74054b0ab939fe9af1b80006bb308f. 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/BRAPI0302091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2888d79683c66d949d46247a0e5db3536f665c2a3cc4c8519b8cbe2691e36571. 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/BRAPI0302092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66b990778c6c090ec89e53cc6b22e77b04d2405bdbd6463cdff2e3e1db5cfa6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRAPI0302084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b7b7118cb57a799e316be42c1f8c1506113baafca99e8bfce7d34a4b84cd6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRAPI0302096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e915b8c23e0d633b72a4d644418736312d2d6026280f874b76bf201e90169a0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BRAPI0100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0ae60008c0b519597ada3dba5916a2375f1fd4533f9931b20d6f6c0b414159. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRAPI0100392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb4c2aa588520936408713f51145d19634345c85c2d7f82be8b2df3a0c4a948. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BRAPI0100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52af294eff856ef4d68646053b613c3cd930e30627748848a50b5319cf3e8ef8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRAPI0200447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2888d79683c66d949d46247a0e5db3536f665c2a3cc4c8519b8cbe2691e36571. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRAPI0302092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606211432cce8d4fe24ea21952fcc4e97ce32b4b235f86a9df694a978f930af3. 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/BRAPI0100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5220917ca17b3e877f92bf3b7670e62160b8270abf89bc6c2f16ccadcc52b5a2. 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/BRAPI0200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1389a6bf864950619ca3867982421a0c01da366edb1490e32b086e71b3ca001f. 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/BRAPI0200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31f4a34f6f44aa6cd5fa7147b9bf5f6c319b42ad210c7794f2e74526cb4cd9c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRAPI0200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca5849308861586429e9b1765b38bcd8d268491f09144b9383d0455f93f9281. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRAPI0200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735b13dcd1639a6e34c3c83430b0d19c3e614f959f937d9b29faa29861924f7d. 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/BRAPI0200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4d77432dfbd8ac0ce002cca530cc2194ed79233c0fdee496dbcadc4de8ebb4. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BRAPI0200029.