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 0x7d2fe4dc5137eea9f2a22353a229ad93565703c83bae5b4affe3b54f5b7a9889. 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/e199b8d6-edde-40c8-8fb6-83fb20edb470.json and https://artists.proofprofile.net/proofs/artist/e199b8d6-edde-40c8-8fb6-83fb20edb470.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 0x9de99f499e1b15222b84fb34020ea3f18f3a437459fd6173f1fcaf37dea179b2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USL4Q1745910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be61c2dd53d535731e0747a4cab8c5308193b8826f50803b9a13cdeba9e6e84. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USL4Q1745912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f328c986316c0bfe4946acd7151bc93bd2e08769fdf7ef06af97d308654a079. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/USL4Q1745913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a0f9f10968e9cd308e2632e2e07e3c84d90955ff8272ecd96c4295d8e0de68. 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/USL4Q1745919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76aac37508185542fdd6e78579848a6dfd8ee1f3d25ee3b4dc48cbb94e4e82e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USL4Q1745920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc670adf859226e92041a6ac0c0eebb5adb5ac307f4d40d8d9eeefae003490a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USL4Q1745921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb0c33472ebed6d6ee99200708e8f42dfb882e4c8725803356e4fcc3e152802. 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/USL4Q1745922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce97910c574720e48439812ba90ba88c561c0533c31d9695bef61eb50f980bf. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/PLA162067803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b86a86add6d292ea6ab024627b1309fd735da3009883628ac097056b7ae7c45. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/PLD652204603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c57e7e56ee04d20efd66e3524fdf1e45b0a6e6ce0923e893c7658d1ffe576a. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/PLD652204605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bf0d8bd0b8e9f0a3aea649293c0c57674e67d1a2a4314a765e6b0a1c15b986. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/PLD652204606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a75f66d6607148d6917f723b34faef997493b1966f13717ea1327c97837b99e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PLD652204607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96514d754a90133097ec18f9d02586a1d00d62134429537efd17c06ba289001d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLD652204610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12559a29cf06ca83669a1fb4c617624f59a2f5f32e33e3b43627e9520838176. 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/AR1ZB2500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54d0521326d8aaea3c0ec0ab67f7c709cd722d2985a41cb18253c163ef0069b. 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/AR1ZB2500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dde3499ec2c3cf01ef5e15b40a4bdc413ae5f5f884c047b00a95f1e7c4c0239. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AR1ZB2500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cbd520a8a6272d9960fef3a26c4d1e7aec739052f77e63a283fda4c79979c0. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/AR1ZB2500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12559a29cf06ca83669a1fb4c617624f59a2f5f32e33e3b43627e9520838176. 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/AR1ZB2500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0653f917c1565a5490c217997ea43e63ffac563664e0f12979227c7480e8f05. 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/AR1ZB2500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11429ab029798cd60308ddcde92b95601d312697334b5eb4f668c9498008e83. 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/AR1ZB2500151.