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 0xed27fc41e6a2f988a661e07ff625601cbe973484def77319f2988f49daa177c1. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa915588-e4f6-4cf4-b4e3-7872fc372edf.json and https://artists.proofprofile.net/proofs/artist/fa915588-e4f6-4cf4-b4e3-7872fc372edf.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 0x804ac399738de8bd5e804c807a086897aa6eeac16203059a85caa97726cd68f8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR7KN2300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8286e51a589cf41565321e933f9f1d3510352eb372b007475640943811d35ca0. 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/FR7KN1800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0626d07cb1e4a7e56305292117ae37eb2b77186e74d7833b7e80d71030f221. 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/FR7KN1800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf271df30e1c08714f4245bdcd2aa19b34455c9c226eac3dd372926d8da5819a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR7KN1800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444d8d23bb57ff38b6d0bd7b7155121580842bd39b20d20ed15887503a86cca1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR7KN1800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1915c5dea7ec5f7b68ba2cc0742b1ff4a13a7cd7bf067a8d585de556ee28be2e. 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/FR7KN1800035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46ebb4cf48bb2ed715ba941e921cf6ac28681b5d209e1eb12260467f3d97e26. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR7KN1800034.
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 0x010a665de00bdeb004bc5cb30adf01d35f915ce7a72a1a9348a4eee962aee3c9. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/FR7KN1800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad837051bf02a4a3ebaee7cf79dd344a00255b423fe14c36116369f24146415. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR7KN1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733cd687d2ca4799d224c65b5e8656b03edce21d38bebcfad6f1dee259f0c33a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR7KN1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0f30ec147933042199412c9dd672cd27ba8ae30023763fbcb5a3c0222401ed. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/FR7KN1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ada062a7169a6b5659b80c0f81372042f8a07a5715eb8f3ef823a6cc9af1471. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FR7KN1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1575961826fe224da7867de40713ac87b700d6f4a0d1f6b3f05c59c7b990ad0f. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/FR7KN1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4188f9ffdefb9b7c6634ef57d18bc6070f357c6a831354513c73f3b721451d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W11506615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb13a2c6f10db24d7efeb3c728bf4e24ad6ca0f8cbd4cf76fd5043e064de8094. 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/FR7KN2300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba149f453986122cab4f2987899388c6a1e501be3b6bd5da25a79d9c522d583. 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/FR3JS1100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161c6cb79767bdf295ca84b99cfd74e0a983f55a8cc2a0cffd4515b665c041ea. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR3JS1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fabeba1e2048bee3bc8ffb7176c97bdd083f8e74399a9fc90a6bfbcba3f3e64. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/FR3JS1100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0e8c3b1667220b4003a502656f2f92665273737c1935be5b6b38cfa43f3742. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR3JS1100090.