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 0xd61525e798f19b5398a18ca8f1b1d03bca7a33ea5aee28e9205b48f28a61688b. 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/4d2c3eae-95d0-48ee-b2c7-ae044e5507a6.json and https://artists.proofprofile.net/proofs/artist/4d2c3eae-95d0-48ee-b2c7-ae044e5507a6.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 0xa5c18f6cfe582ca4460a10e4e926b6e1d2cab20f11ecd04d91d43f136e19206b. 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/QT3EY2401786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2be2a3dc0f2ab1cdbed83b3551b7234c18f482222432a84bfa178925bf60af. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3F22493174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae7c317e50da7ba80fba8ee73731f4bf46bb214e31561e31b66ce576bb19717. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3F32450723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe434b8b4553c532ebbc9d5c239b1997d2e9bfc7fa11935c31683338d5b22e4. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QT3F32450725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102b395ce421b06cc09d172949e775a670fc884820748d86d2e6f761ab6e53ec. 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/QZFYX2582306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bedd7c3465a668796abf72d06fa4a21ff6658f50aa3b7674e766dfb6522cc68. 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/QZFYY2596401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3180c9c5d8236532a5a82c7ef1ec1b7b57f98249cdda45269f47dd071f6e700d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ32558228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cf8f6cf5d4836d50edbd7217e7ecb5eeffcee0da6bf380113436a08238af7f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFZ62559495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8a05e45d195e9bab71559b38cb6b0bfb50071680df5d030664b0dc936dbd6b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ62559499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e767a30b5fc69a882961aa85d3235cccb3158b4d942a03818d087d4660d326. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZDA52558946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de5e67fce2abfe2b5f00c7344054b0acfc0994db79c3901a5ce9b708434a0be. 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/QZES92544566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2091ecc6526b3198fa2ff58fd85bcf621c4a78f887fb927370cd5b5aa964b333. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:26:47Z), 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/QZHNC2506266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0e78ca2aa2d3e50613d6cb2adddade5184b33e02377a920a7ce90a01add2d6. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHNC2588901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f73fd56a948b8d129b972f70d4b833cf3c5864369b7407a502e597ac5e2ffc2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNC2587179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316993be99f7c891bbee3fa9b01cdc818c58e1f8c948c9e718b1f188d3bd98d7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6J2535611.