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 0x73e0baf37783ced574592db2411213e805c596f24e9e2a563822c74337057150. 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/ffd9162b-d15e-4cc9-b09b-5f7290ea85a6.json and https://artists.proofprofile.net/proofs/artist/ffd9162b-d15e-4cc9-b09b-5f7290ea85a6.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 0xeb5df8cb40fe6be7279770856ff5a3225f20a962042f9dbe878633913022cd4f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKFT41807598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90740796208dd3ce242761cdd4864759aa2a259ea0dc0f75d1e3183afd6d13e. 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/UKFT41807510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e18b3a112d72baaa7396a4d033d4086362ca2c0e95cecdd790299442bcd0b7. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:33:44Z), 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/UKFT41807697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe152ddfd5c5d4480a2eb695ffe6d5ecf20873d69be553588ccdc9464d55dc59d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKFT41807503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbdd08456027ece535345aab255cd488b84f182b9513a3490252d4b60c4e417. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKFT41807505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc856a9d9f0551d79a7bc5fb697890b186931882da5d4fba256550a6b38c77ab9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UKRKJ2002647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8b31e1760227262659c1b084f9c8058af25c92e1452a07d494d62a790419f2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKFT41807501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d34ddf38bbb7f3908853edb48516ab2dddfd4665c78cc076e041fcef4051a4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKFT41807500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3623fc693c47b8da8f5bc52e884832a13a991075620e26adb2f03a396f874da1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:12Z), 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/UKFT41807504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0e6462bb6458ab9688faeda864e656dedf13ec430fd8ca620e0ec79681a429. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/UKFT41807591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1408e2f10cd10f3ea1a8639114e352537e12b35c0f70ddb1c039374a9bda9a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKFT41808492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99354fc459b5f85a892a4abaf296a7a8b7250a748b8e17b6482cb8c1d0529de3. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:58:13Z), 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/UKFT41808555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e59410d51fa56dbe7ee92747e3178757d3dfca22dbe3a923624032729da5b71. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UKFT41808499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf256bf1268936ee2a7a7faaa127d281ade1f6152b804341d7efad9213be88dcd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKFT41817847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8fa3a13c0efdabbe44e6a7fab81651f750a3dec654bc280ca8bbb805d891ef. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:08:29Z), 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/UKFT41817830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746af971995d7829e4eba0804e04c5b9794fd94731c4fe06e49a0a54cd9dee83. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/UKFT41817862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb241b16949b2644dada4cd2b3585396017c98c681879b7cab85d801a6d5177d8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKRKJ2003382.