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 0x0250c4fc9dba88aad3cebce6b25a8a1b1bd516ff7f3a5afb394f73bd5bdce3b3. 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/f3906242-ba01-4502-85f5-e2fe27540c22.json and https://artists.proofprofile.net/proofs/artist/f3906242-ba01-4502-85f5-e2fe27540c22.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 0x26b43c6422f7c943e27d21bc6f537165f899effc320922ed9d8346e8c781a164. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRX201847840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe6a22ba4065c5563f7ea0d47e28fb79a08d020e8544ff3842d87d2d907fc1b. 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/FRX201847844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda39bbf62042f74a8dc56c3a2d2b85f11fbe6d5b452ab547eb21fdf9f880fe76. 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/FRX201847845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a67c2ae3f9dd515e5fcdadd741304e514fcac3af0f96086795fef480459aecf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:33Z), 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/FR96X1921685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d0066b624dbcb1976d5c1798de29f37ae5382a183ed5ae3423ba6a077378d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:53Z), 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/FR96X1921686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e44bc9fdeaaa17a9145be8183acfde288b1304debf643d20e2281d740a43a8. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/FRX202059667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ffc146cb081def38172941941399dd1804d4ea4f97417499dcdbef367e8881. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX202099691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f5e5cc9392799981075d1eaf4ce98c543601b689aff27006fe6e1fe0b8d001. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZGLS2288215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c777ce590fbe5572e95796745025559bf9d1e7a53e13c2a65fe38981beae6e. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/QZGLS2288217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932e4c04d1dda67086d040f778ae86d706b293a1066226e60c4db61c871d2c0f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZGLS2288218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169eb60fcc24f602002856942fafd02e0b19d242bc362912210adb974e83913f. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZHZ52221607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb504b220de9d2a7cc195702d0223aa8e609976bd7204df431e3af973377ffd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:21:34Z), 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/RUA1D2263680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c480272fe7b22545ae2ecc4d2b3ec0fb4302c8c03ae0b71e795d9ef7ea07ed. 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/RUAGT2331448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a27aea03b66276963e0cb186c834a45f08bb2d81ffb31d53213c47aff73b26. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:03:59Z), 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/RUAGT2329631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d181102bf3c30279457cddd2757cff6a79f8e2be45fb445d7b3ce49f1744aa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUAGT2348882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b87fa4bbda08935edee20c7715bffe85c7cd0bc56f2e3d70b28503d2b01a98. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/RUA1D2445414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f298a83156428b6b705c7e0c5c6a0b1667b20f266a35753b7bcabc81c95a51f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/RUA1D2497934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0045b221456f8f206ed6a071ff326cec8645daf9b84ee0fc886ed9a4cc63cf7f. 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/FRX762161763.