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 0x410648a83c76cf5954464489a09af2812e755735bcef8730f41b2c54d45895c5. 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/0103ba51-a3bb-4695-91fb-c0020a3e88f1.json and https://artists.proofprofile.net/proofs/artist/0103ba51-a3bb-4695-91fb-c0020a3e88f1.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 0xba43fa2a5d1984c4b0893a42ef624af0236136f0f192dff7f77b365753b986ec. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NL1AP1968044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84422aaabfd064440826ffca86eeb9a43a071d1e9bb812afa23848c74e447292. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYX2045091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d9a02018d7e0b43ddf429601ad07b26c5aa5aa00c485b3d1baf3a4f293f246. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/FRR642100924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cd2714fe7a9941172882c15cd2098fa953fb14733d3f8ffdf043fe7cf7fdf7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:07:51Z), 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/FRR642100923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d9a02018d7e0b43ddf429601ad07b26c5aa5aa00c485b3d1baf3a4f293f246. 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/FRR642100924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7414393c905ead6d1384911e111ea50021afbf19bf4e0208515ca75f7323ea48. 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/QZPLS2145490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2347b79f67803f722ffdafc50aa1fcad03338ee4d5fa93e2308ec959cf78f757. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR9W12329070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b463527c1506987855f54ac0d236b99e2f97b56fb07612a2fa1b3eeeec9b48. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/FR9W12332817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48881d3bcb4eb31a22df49c16d7770625b1da9cba1003c5d42cffc6bbcf72bf6. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:47:01Z), 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/FR9W12332819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659f5c43109b8344140777e3e4acb666900c53085ef091ef6a06189bef2d2382. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZES62493224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab3af26e3334129395a495a5d8abfc8e8d1c5ef99b04b1cb98b5c5178946044. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:05:17Z), 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/QZMEM2494058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f9d1f36df2bb32a156fc18aab83a38ce2e9b25a7ea7ab2f6ddfc775e14c27a. 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/QZNWZ2551655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a85c66eaacb8417744ad04870f2843cb4d06b70bd08f1d2809c5a19f380d71. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:58:14Z), 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/FRX452508284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f9d1f36df2bb32a156fc18aab83a38ce2e9b25a7ea7ab2f6ddfc775e14c27a. 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/QZNWZ2551655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a85c66eaacb8417744ad04870f2843cb4d06b70bd08f1d2809c5a19f380d71. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/FRX452508284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6862687befbb971f1f206e185754d10cc953ba287be633c9b3d84a2438daaac. 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/FRX452543444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5537b574758c8526104cc42572c299239767b91be2d67c064a802e91673d8c94. 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/FRX452543445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe184b6db2d64213e8bdd85d057f5667dadcc7acc959388ac7aeab46fe09dffc1. 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/FRX452543447.