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 0xc88ec2d76b04679c8f64a3b0bd4be6ce275db8939e73b98f8f8f23e5ab942022. 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/f795dec0-b352-4a49-bc19-53016ffb6ff7.json and https://artists.proofprofile.net/proofs/artist/f795dec0-b352-4a49-bc19-53016ffb6ff7.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 0x7bc494788c43578b11c913e2b5e1877fcf1e4b233eb8acac6ea7f0fbc13c4784. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/AUGBT2472638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c2a2f004f1b3cee1e1f061c7ddd5f34847b27dfdc4c9c1074c1822917e9c0. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/AUGBT2472641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9205c2c43e17fc5737471e52335746b821fc4f0c1f60e95970b474ae65889aba. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AUGBT2472643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9645478199a12abba55dbc8dcea227af0a1c463fce79587caf83014f7255071. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUGBT2472644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ff62b4c5bb3d70cfdab857ed79c3f65db6475289d00869a76b4de5a43115c8. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/AUGBT2472646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58523d38d0aac8bfca3a8b9cf9d590e2ff73b343e352e300aacfdd04a1964a8e. 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/AUGBT2472647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824b437dd4c1197a9d5154faf5a7d12de8512b50c987c48f4bb21e5656bbad91. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUGBT2472648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951eac354ef794d2d1899e5a749a42eccca932aaadb9c3e9e1288007207b81a3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUGBT2472650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ea139834abbe3579409c67014399a2781fe050af50909fbdc8a14d98c68de6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUGBT2472640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ba35fd5f6a0f154c65ac722ac88b4bcfb11f92bb94f8d7367fe6c1f7acba93. 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/AUGBT2472652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6696346ff275b8fc7367570dd4069d0b7c6fcd3599f3b92371bed12ecd99dd3b. 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/AUGBT2472653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604974e449c07e2e8455e0e68d12b1e34f7fca60a4f206291ba4a8f3915955a2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/AUGBT2472656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7e96865f535117cc7bdaa079dda3b77e90735c80cda772256337c373b78d9f. 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/AUGBT2472657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a0f6ff8cec6e920f088ce66f9783e961f56032be984d188aa878b8b5cef13b. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/AUGBT2472658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880408b773c3880caa6b12bb10b129633b0cd18731cf914c2275b7c601ab41bb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/AUGBT2472659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8319867256a632e4c1643e4c1e3f9383a0cff043741fd2220e1f49b13037c75f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/AUGBT2472784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717a398503c3eb27aa2998e2d3a93d07ed49fb4f6eca9f3ef442276cdab72fb3. 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/AUGBT2472785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ac2dcefa784a823242fb20ccb325fc81de3ad37eebe7ac5826593d9c330d3f. 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/AUGBT2472786.