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 0x4ad5740006a850ceffc2d7a51654c60fbf54685bf150d416a9720d3404641abc. 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/1b677e8e-8903-45f9-978f-e7408bdaf367.json and https://artists.proofprofile.net/proofs/artist/1b677e8e-8903-45f9-978f-e7408bdaf367.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 0xdc563765d77fbd607e7fa6bbda0cc15c986682c45901adc6bdbb20cb38193bbb. 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/US4K31000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e293153e7fdfc46e0c2765cc57b557d6ffde29a5f202423123f9eedf4b1cdaa. 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/US4K31000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7882e51866eae3076a14c5821fc9c18422606fea04ccff52c78c48b5b30e51da. 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/US4K31000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbdd29abd7d46a25cbc9df6f3c3f821d8a666408464cf9e4dc0304fe271ef48. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US4K31000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadce96aea36a8fb0c64e246aeebe480d9fc58e09a27dcafaa9e26fed02ddb88a. 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/US4K31000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abac6f11a231ae6e6982b5c8cef59cbbeb0ea5ebd9042ed7da714b6194dbc0a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US4K31000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6460bc7c794bd438841e6c4da5776dc179fc4afd27a606c4ae74d8d39028fea9. 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/US4K30900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5883954397174818045076de598eb1c253e9a4a4870aeb51b4529e6cb389bb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXIV82480794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388ca6826a30a4ade67295e5f21170523f570aa9eaa3bcf7f29c0916c4b317c1. 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/BXIV82415737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5626bb1e5faef10c9fa6082f5281b538485627cb6665116df2477f344d19fdd7. 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/BXIV82491287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7023bc7ce064886efca02de4502f0161972a20d9c7a7933a4b2250f419bcbac. 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/US4K31000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6460bc7c794bd438841e6c4da5776dc179fc4afd27a606c4ae74d8d39028fea9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US4K30900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fcaae880e24ea0e7bfefa8cc187a5f3449087455167dd703e89e142743161f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US4K30900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e1e37c5ceecec8b8748726b3218a0a7ad8be8d0671923d92619c67ed9910c1. 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/US4K30800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ad0752385c7ab551d65882a281517cb8a92bf4f3b34bf4d6e789a6f02e63ae. 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/US4K30800149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ace559e8e39a626260216e83c27e9e6d93a7b1c60e89b562d165846095cd78. 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/US4K30800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f615fd39c50b3c80950a7fab48be5b507a58a00041748f81bca157069cc8a1. 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/US4K30800151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75084a6c16c6f2a3bdd045b6c81819719f4200271418bce33564540e253a10b. 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/US4K30800152.