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 0x51031d8f677b38514a0322f600adc582aa85b4a201455606079a72003c3a91ad. 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/51aa9946-cd13-40ef-b4e9-20d774095c82.json and https://artists.proofprofile.net/proofs/artist/51aa9946-cd13-40ef-b4e9-20d774095c82.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 0x3c4130fea061c8c03c47351379109acc12ed29c26c302746cd58b92ef7727c7f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL1010005076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c16c0966a004272ba916fe797745a20671812a0ba681683606b284ef2f2432. 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/IL1010001291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc771571de8ab9916ce395fa86c0bdb5eabbc9967982a6edcf9eef7e6a421e5aa. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IL1010002078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b123c3e955a404ae7847d6fe499fdf6c9433b818cf292a525ec953909c0367. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/IL1010102692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefccb496e0ad06591891c0d98ecba0fc5f6005bcfa0b693f9dcb0994784d17d6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/IL1010003150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e665ed0c53a2a661a82a4e259188b8fa2d56cf2e29a72c7f2924a30fd92f75. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/IL1010005324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d3d3393a7db5c2b45f955bddf53a67dd35e0b2fa3d3c7acede18cb426241f4. 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/IL1010100547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcd1780ed0c6bc22a626d25b4abc99a3288d85634cf59559be674d0b17a1071. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IL1010001887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0387e78a2654ef145e4ffd7ee3069cd642d9a8e19f8373ae723c29d797b62d6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/IL1010003600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb63763891e21a274bf6d64d7533ade70bfaa573e6f1fd49cc3030696b7f906. 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/IL1010000346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b91d82e75e888d6fb5aa99232f21cc9a90dbf8acef62bf7177f2102233b01c. 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/IL1010003322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e721484558ba839674a6affeaccf732cc1a404c6883f6829f7f26523be302a. 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/IL1010000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa228c198d2c94bb0b5121e2808d8532535500452122bd35464b0deecba6411a3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IL1010002998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b5e5acba7ff9038aa5da9702e3f3738dbcd997ea3b6d07aef7a2ccb3be2318. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/IL1010002080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eba5699ef64de96a177f202ff144319bdbbf55bd44243c92d3d0da8ca1cc1ba. 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/IL1010000359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e5f976583b66af1c39ba4b64a8d280aae44d9ae3470b96da9cbd0cfc0821cf. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/IL1010002790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfff3af84da0a59a99414db5ebfac5a7745f73d442b1d5107b4dd9f075315b65. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/IL1011097548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34fe32b0448d2f65e21849708bc007662a0e24d939361f88fa738b07b0f8edd. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/IL1010002418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa317a62bbaba64c88b8061e1538f5f8163c5d6eeab98118038be39e6eba0ea7c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/IL1010002677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32585ccc9238fcc6bd45a1c13b35486459f6ea686df20d5d6d97616792c715a. 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/IL1010103070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84204c94248be99d289643926fad7caec3c84453a5dc91058c9073366c2a1eeb. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/IL1010001336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3820f65e9c12a6de25f0b44b15357fd374d322ae187fa78962a7bc64e8453fd1. 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/IL1010004210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979803a4fbe1936f22dd66ee1bee381de19bf7b58b07f3f8ca5d18d60681919f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/IL1010005128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95698c6c4b925f201653e13f4b47569c7e625749ab724500f8c879849ccac6d4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IL1010003617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6c6c5f51091ff14b66f32b870af6042c63ea6fbf66c41ad0cc05e43180d887. 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/IL1010001411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561d330e72f4bdd8e8b94272e358253b9da58db9d15f7f38da038d6a5f7eb689. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/IL1010001179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9a9ce3b0efd2c335b58c4bc21a55ca38ea5d2ef82784f81a75d8171c093553. 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/IL1011126999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12ecdb66c0c32582a10d08cf0ae16a4eac1c96650ad6861f41ed4cd5b793baa. 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/IL1010004065.