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 0x3d3a86c7f0a63568418987f3cb280b7bb98822a00e3a2cf1e7f82d420729cb21. 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/b4ea7a28-c16d-49d0-8b3c-ca18a8efbe61.json and https://artists.proofprofile.net/proofs/artist/b4ea7a28-c16d-49d0-8b3c-ca18a8efbe61.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 0x5d4d3b75d5424440a281bd3286a73ba631003518a6aea379c9421aca26f79454. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BKFUX2300621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a29f69ec2feaea6a16a4711d2c7b3e295bfe0908bd00476da257c9567d24b3. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USUYG1598013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cc0342d6ba0f8d8530df3220b00b8f141b61687b75ab029592511f59a1b002. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USUYG1598014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2950491f4e82fadf5cdb49143d96dea712d29bf77441f6492558d9976bfb3bbd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:31:57Z), 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/USUYG1598015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203fc39442606568d5db01f742a183045246a10b2d1ccf95d69aeef9127c2135. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BCFK52500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4b770fe5dfd967b583be058632b5cee58ee85b1b3ab10b29d86d5a20ecacfa. 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/BCVK92200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77d4791021ff398f73a2790fa8a6d3d70329a4c038c59679d2eb0e71c6a6820. 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/QM4TX2440021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba2d15c0517d94d31f589b8949ca086c1ed561c2ad577af6256d8ca65029415. 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/QM4TX2440022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35142f7ab3ee2f3ce2c6b78ae38b497467c09265f9c1bfb97440f821c67356f. 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/QM4TX2440023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bf5611496b09edf2ce1d8d91f9aebbecb83291a87da9966fcc933a80f0bfe0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TX2440024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71b1b15c05dabb14984f7fe3c26a6226f2a0940cc57bc73f540ee5e81533b4a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM4TX2440026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3391a5daa7a6e4ff175565ce807f5aaf9729c5bd19703d45517db464f56509a5. 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/QZNJV2403404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda12b7a4a8f70487d3437db9a5911574e5245b249ce72e492e65fcf0760ff66d. 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/CA5KR2477345.