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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12972bd155f7f20acb30644f84da4c6bc6d5f0fe0577995c8c66f0fe5a974ee4. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff87dd5b-568a-4a16-80ad-14714d54a626.json and https://artists.proofprofile.net/proofs/artist/ff87dd5b-568a-4a16-80ad-14714d54a626.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde2dba415acb85d10ee8d0ae5c98e0179070b3d250f600a6862fe47389e94e1. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEPA52103001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eb9639f93b594c41fe9bb9cc997a066504d473bb62ea2a889ffb94675be4af. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEPA52103002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43411d91fd142b9c731f2c68596b6bab81a63675190d940d88188b602a6c0db. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPA52103003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ea24dfbdec4b6a80cce1c7adae97a2d83918ed993896b0de4b8d960100eb28. 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/DEPA52103004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59da5cb86c750d43fa2ca54c08cd82ec90a7a138b70aed0a022743c98e8294e7. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEPA52103005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef227941adf668c0e8d92757a9b325d8b46db9f44defe1545e6b880e2ad4257. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/DEPA52103006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041846ed9965d985c530bca46fb274170dc92e19836cd894e792e198d6762362. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPA52103007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e756cc5a72e5e5687cd103a41ab290ef2aae58bde000a2007df6f65cef3823b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEPA52103008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e46352d50b59ca6a587da444d639c052af38c43763c4fc53395656806b18e8. 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/DEPA52103009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbee49205290412d2c21b2127d01c7fc3804b87063134975827d0495605f1189. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEPA52103010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e835570374b52c316cbf1d7066a1f9b6e4dce518426893d15ba8da9d9373a2f. 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/DEPA52103011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29e794502ecc40ac573b81d5b1fd6b4049d46d8828bad39626ef6ca4b37f911. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEPA52103012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca312a3fb1565d5b4610dd8aae0c0baa65028aa32c7fbd7d55f0964ebc280f7. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/DEPA52103013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb044fd991b1b40ddd9ae67f0a0a620eee2858ff8314243e071fcdd91eac086. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/DEPA52103014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8e79ffb03663e6150141e78af95e4d78b21c96637e804ee110b0c39801b0be. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DEPA52103015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c44784f421292cd3ae4666433edea1fa145141ccfe740974985ec425ec3756. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPA52103016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66df375a1b65eea4bb3799aefeda58bf23b9030e2966ac162ba58a796ffc5a7. 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/DEPA52103017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe268e0cbbfb861b9681375e24dc799be43753b3d3a9a81ba95b5f8fd46581975. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEPA52103018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd6ba5b22ba5fc1ba524ec49f7d4c02fd3cc1f1ad7332cf64db28df5e9f0e95. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/DEPA52103019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7c4a7398e653e80226dccc10ae682738b925caaab848c22d9364b66135436c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DEAR42511055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96651dca85e894f66be8e3b6c4db201f128de1acbd200d197470990d88125aeb. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/DEAR42510966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7abca516f99d5a8eb0d1981bc05dfafb4d6f3c14143852c1d89d5833b53f6d6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEAR42510963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7f37889d705806d0640311f1485d992c03befce0cfcd589f96147cd43b82cb. 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/DEAR42511547.