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 0xb12eeaa0e90c947eeee754e4715989a208e96fcb09f298db408ab1ddcfedfeb8. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60e3d0e2-ba36-4833-a25c-91eb040901f4.json and https://artists.proofprofile.net/proofs/artist/60e3d0e2-ba36-4833-a25c-91eb040901f4.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 0x6376de0fef84a06523705ebd998044c31cdfcc4857beb896e6a9bc49aaa551ce. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:50:59Z), 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/CNUM71900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ae27a30cb472f1a9807b2cd5711315e583e2fd95db09fbc9d685ad4005298f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CN2DY2501713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa507e3f09c110dc97a1e1bbc61d2d1a14a07793d9d3751a4134ddb744ce25af6. 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/CN2DY2501714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03d7dd916e57a0ce621e166414951c3175210e434374e30914536e2af37470f. 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/HKC372530921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f724163f310effaf5ccd8eda3b9903af9ed35ad21e4dca754bc0dce55e3aaa1. 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/CNUM72400643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2886af458fe3a294f7ff9df4b0b3a7a53ae36e31890d5be1523c7e3c8be6e5d. 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/CNUM72400649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6c2874b26424ba3b2a97940aa39f5dfa8f46d3584f72335a5a8aac1d37d395. 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/CNUM72400903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791d3bee7b518aa4e7fde7eebefa9466c28adc5b5dbcd647657dcf2160d87a4f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CN2DY2500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e331b821e7d3502ab51b8a5f7c50869245bbcb19446d9f690f0bee3bd97d12. 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/CN2DY2501873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09162b60fc8bde8625bb975ef9b67ec96cac9296fd6589a5de6c368c2a5abd0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CN2DY2501875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9cf597c8879e0c329398661fcee319b66e9f6f7a27fbcbdfeb8731e5160754. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CN2DY2501880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5ca2d8c2c8fb2b27e70aa1408d3898ad183a7d3e150d7519082e0cff62a06f. 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/CN2DY2502268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e431b76348eaface676aeede40782e7743afc6b05ff9ea98a5f853d484efe1. 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/CN2DY2502272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f59bc4ce52d2cb4937e5c9654e856654c30d65e8709984d857c71b8bcda78ef. 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/CN2DY2502477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cf3a768b534425de6ba76d6f4fd2d5b73213ffa837715b67e11fdcea2da2a9. 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/CN2DY2502480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ba82b390e3f5f12b5bfd7e63032121b7eed4e280929195d68fc9a58ba8a01c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CN2DY2502486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ba27add3d5ec6bf8925086e52b42d996bb83a0beabd7663f7ae40b0e725bbf. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CNUM72401018.
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