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 0x9419079abf028e0548afdc1a80261183362bdaebf85137857be00bc78516977e. 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/68c86840-94ea-4f1d-a188-a6fe87403b2a.json and https://artists.proofprofile.net/proofs/artist/68c86840-94ea-4f1d-a188-a6fe87403b2a.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 0x06c97fe39e6e0041167e9df4c8d34d65f2e78071e4fb413b721269e407955c52. 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/FR2X41466955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccccd7a5d0502c4b0c19c2b7edaa1d83ec602f41855e30ec64637ff1176bca5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR2X41466982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3e62da2a55d672832951c161f77bf88dd543c708c70a86ab3091df2822c608. 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/FR2X41466728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b687b780a235b30f274cf6a93418e58455ae0b84909f65d95d2eb91c7c3bf3f. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:50:26Z), 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/FR2X41466729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc155a358c667ee111a50fc58623f3cdd8c9c37014c24ed7b2d74e483d69ea7f. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:37:33Z), 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/FR2X41466731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cf7d718e378672ecaf171883ad40bc00c1a94020cf0e2a89a1ab9fc60cc3b8. 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/FR2X41882589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe405f0f20b7b0dca722760fddd70e29e2288ca7b3203b3351c18de5c83f04a5b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR2X41882590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5086e56ca35287ef9dcf4c728dffbf21dad90e3f33b69593f52a6dc06ec4b38. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:29:17Z), 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/FR2X41882593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2622837a41d1f9393459afc08e5acbf6f6553a326abe7f5dff4f3380576aeb. 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/QM42K1916565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef7493b9d507e6a4ebf29d9351993e240fecb2ccbebd32588247051976e2266. 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/FR59R2265300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3d1e3e0e835bea2e391f93ef65f4dcb5b1d68a5db337a0ddccde219843a198. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR59R2265301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7afe656a3799fc52d0394aa82bd13101607db972147b5c05f0b883d4677e68. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZMHN2380169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540add7c85d07ce53e65bc52cc3223bd98f08bb2a2c39ad4f5acd2738c2a235f. 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/QZS662269268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540add7c85d07ce53e65bc52cc3223bd98f08bb2a2c39ad4f5acd2738c2a235f. 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/QZS662269268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41d1eceb4bbe0e823b366cc10c8f7121a65b6b2f71acdb4237069a5e04057a2. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:08Z), 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/QZS642406658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b652cd653a8704166a25d6aaac1fdc165aaef2063226510157bec8f2e63a53. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZS662407429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7678ac4aa012a6b41d0eaad113fe0570bced0994668d7c7673c03a57e155279e. 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/DGA0R2468356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd0c2d302f6bd002ca87aa361515e918eabc22f1c28652e76dd43d31b5e33b9. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEUD42553204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec372e6b7deef14e1cdfe56aac629fbacf222f85bc73c6f0d6bcbc30c32cc70. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEUD42562282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3d544f39cc5d4c771a3f58edc2de5e3388aaba77a14f47cb081400186dce62. 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/DEUD42562922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9924a9c76e34f4206ee4e759f5cdbc6bd7b9b86b5805dacb1fe0eb1d9fc7bb27. 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/DEUD42565330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f1429845e304878918e33f7bc606dcfeb375808eb46aa19fb48e798e17401e. 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/DEUD42574680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc612783c8ae8c692153fef856c75e32377734cac1be05191bc2da0cdfa3dd14c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:44Z), 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/DEUD42576718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7613d3e994adf76f74a475c5dff8a40b56292b9de12b9988e5d242809ae8b210. 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/DETO41578590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad389a2b53dd7a1b36ee4f09752fe16eae138061e65183952e9845b1f5dd1b. 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/DETO41574513.