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 0x64d2cd0c4ffdcfc1f8a00f35efd9c443a2ec4f22f27536e44be478a249f07f37. 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/8399013e-4b21-46f1-b959-c7a2c82af5e9.json and https://artists.proofprofile.net/proofs/artist/8399013e-4b21-46f1-b959-c7a2c82af5e9.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 0x2a90df144a6765317ae04c7b972e1fa28ae6162bf24d02fdab384e52c3a8e2d2. 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/ES5039800248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dd94deb72121cbf22d0043513c5374d0d13d510d1aca702ac0ac4732386b9b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:12:17Z), 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/ES5039800250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1139450b3cc24e521ff54958e7d0563a6f1ca25b6702155378c95ac3f6fe60a. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ES5039800251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7997a39085add2710aa9f018286c57477938ad6ecedbc818a851fdc819e242ad. 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/ES5039800253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e0ba0444ea344aef74470b2d90ff00efddc2f392b72c7b95b1050349e0f6b0. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ES5039800168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a983cc2baea2519b5cfb9acd0ea9266d7f5cb0e0cacfa9b6dcf82bcaa015521. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:23Z), 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/ES5039800257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad104063bb845c38ee6e12f582aa5e78c5f4dd44cf1fb13d7a87dda77679444. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5039800258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf386445f5f8df3fbabbbb7687587420a677bfde615322a2d3536d631f094b94c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:28:39Z), 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/ES5039800259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a129274f0b3ad4c00a2074e80a2e3bd07d72b81d3de25f597bf2df2374b17f0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES5030000255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d4edc27776dd59ea79b23acf5c3f3d0cbddbe879c14f8f8bf3cd669b70b94a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES5030000256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b725108df4e9b020b2a6ce611a1a6017b0dbaea89a2c58f2e1aac374a06c929. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES5030000257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0e931fe3d2b7f4d247739b1dc6fc51f2f95d8166e9e9a80a7e7c872a1267c5. 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/ES5030000260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6153160940e814bfca6fdd7816a8ade88364963a63c63df53011c98dc427cd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES5030000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f735d3bc469b8e093081c9696b98610353efdc181c88574a162363f79330b5. 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/ES5030200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168dd709f20a2fa6656d6b0a383344ca18232b5358b85be403b81d86b5ebcfe2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:34Z), 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/ES5030200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46ccdc9374880ad25b26e90937ed2cc464e89909aaf1d5ba64fa89c59852fba. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES5030200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fbf0c1fbb5c17bf891e07789b7cae2f841fc415acef5132a634fd187610367. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:16Z), 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/ES5030200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7445e249303a6ff706f2200a9f940ad670ebe6fbfb21918b751fd574b0af48cc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES5030200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe10209f964063aea3fe99a49dc672a85ab86b5e256c25b9b227a02ac370c3b. 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/ES5030000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0d191cb113b89285af297a00cb6fb3ef5e50f594621bd983d7beef1f23ac7b. 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/ES5030000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd64f39111f2052914d73187b76a0977fd9986ae1a92494cebea69c1e7e307f9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ES6100220213.
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