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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 0x23f12027469066af0f501da120d6531aa9d5b98bfb1a0a36bff172e670ea31c2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/818c0a1a-10fb-4035-aaf0-a10d73ffc6ba.json and https://artists.proofprofile.net/proofs/artist/818c0a1a-10fb-4035-aaf0-a10d73ffc6ba.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 0x98ab2d74548e84959d5d636ded4f7ccd384660d183832c22f2219a26017a64c8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/UYS261900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edc3242b29c83e7c6e4625748b1671e558a617bbd2849b1c414a78b0311f535. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/UYS261900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a6fdc07c20cfedf50955d07c779a45bc35c5bc8fe052b91cdfb1487774965f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UYS261900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd04c754093cca45e52168c60cc41238cc0579dc6b24a739889788cfed61753. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/UYS261900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f333a2d8da56c24ce6da977bbb828378cb4412cc0f97f7291eb9f496899a58. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UYS261900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a9921fa68f5f874d55ce0bcaf6f76972d35e116d8b46af1db41f8c978d2ec1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYS261900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988c2be681566c77e79bc42302f37888f56a39b11cba36f68de22f9e70e83bea. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/UYS261900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e6b273100a0dfc46d5f1fa9d3c6ef5015ac2de36d1ba6f1f9b34d06fad4c06. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/UYS261900078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17435b8ce3605907ba5ad1a78feca711ad6f452bab1d649b40a938155ad063ea. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/UYS261900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d1a8d6acab47eb2a361935ceacabb5152cfaf526eb93f631235e3cc560f172. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/UYS261900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f3fe2f6f9d943b9452e95911da75206cee33bc11f581d232d1d66fd8b60da6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYS261900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2c7d4f3e110efcd38c0653365c7fd94ce580ac5332ae47ef962a9a7069a75e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UYS261900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b0019cc13e8a2f7d5c706f2d2ecf609585096e59b8b1546e227399206f0da. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UYB262300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3683b81e32860708a1d25e8a136b0c02aeb9cf441ab88ec64058964e37f3fd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UYB262300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9411504dd74ee4855881eacf4d06e3ebfb1ca8a7f33ea3165d820d27d8493b6c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UYB262300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa581774b59c35c7ee377eeb2fdc39cc6d3ebee1a6458268881985b5acb7888. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYB262300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0b49c0958c11af554d406288bac5e3ffc925a7e7b7869a2e103ef00988b58b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/UYB262300228.
6:30am / Solo quiero salir de aquí / N.N
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eadbab93c4412e7afc23fc2fcfa8c1f65fbf624910ba9be7d5cfd68a515f2ca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYB262300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148e02705be1ab993573da57e3c6b53834837b0f68e73ac55a0ec9b1f1507152. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UYB262300230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6dde9822b03649f88243a43e51bc952e71ede3bca88b3e9946dc77bcc48f32. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UYB262300231.
Por todos los que están muertos y los que vivos luchan aún
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179a6354c07bfbaa7394a928f847eaaf517486fe60b290c430d52f6726b8f645. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UYB262300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256faf85057f4c3fde503283cfd68c566183d51ffda7f835d111d977518ae856. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UYB262300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952a68b849668d64abfd3c8e5a17594e03157ddd7ede5518f75b96f59f6c4f14. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UYB262300236.