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 0x741ea2afd8f73869ddcfd55dd11cf6d0f0508477a8e5c907f247045a1ac7e474. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b12329f6-4f57-4a84-9dd4-58b44f851984.json and https://artists.proofprofile.net/proofs/artist/b12329f6-4f57-4a84-9dd4-58b44f851984.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 0xec9c32ed6e298e6be4203a9d33bfa49358ed996ba4f84ac7f81fd7c8d96857c3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GB96Z1103327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8674d17cdb26e707933c2d2ff6505d1ea5ebc5ff23cbfa8c3dbb85bc65c39a2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GB96Z1103328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057de1f781308a5773cbceba78d20a883fed53301309ef5c4d6445c6fd9d6c5b. 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/GB96Z1103329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ad7b7e8664f50e6508ebf0af69b31206841c41cd1ac7522832fa8c7a1c8554. 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/GB96Z1103330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cac850407e78c0d38984b121a7d29f75c66b4bebf4e38235d77fb474783b7b. 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/GB96Z1103331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9745e9a805522791f43a7f6bdf029877138c188b928b1a0ef04a57ec6a082a86. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GB96Z1100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22793e5dcc53861b95fe01733915d6d02cd9f330a8608b25aeebd448b92c65de. 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/GB96Z1100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cea77a6d43a8a40d30998f12e9a5e451da5b6715f6301eb50b44708abdf4162. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/GB96Z1100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0949ba51351fd1528eef11a41aa6eb371728d665f10ca67de0ddfbedf747659. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GB96Z1100074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe743092307f376b27866a80bd20eb2404a5d90dc31f645b0c3883d82d3d93612. 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/GB96Z1104562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f6c8bd1c2b03be829a3264ac12b1beb0fecec1cc01329e5970a9a9074d5984. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GB96Z1104564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d4595c94cf52c8623e13ceddae88d301651c3c6d7cdc45b73eb70ef690bb5d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEH742506226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47115edc58db23f9c4534fe1fdd17642aa6d74af575a2e9bc4aa295d9e936ac. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DEH742506228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2427c50de99b594f222bf66029caa1881e61142110952ae3e8b0819055a48f. 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/DEH742510692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc34d3cc4755e46e75eff939164616f321d2019fa93b1475a84b3343ff99652f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEH742510873.