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 0x869ac50ce35e9d1555e8afae019bf7a15ea2e5322edc61d74123ae6680f69251. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/768c046e-d14c-49ae-a174-c1790d1b4eaf.json and https://artists.proofprofile.net/proofs/artist/768c046e-d14c-49ae-a174-c1790d1b4eaf.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 0xd0e8c524ff8f54ad9862d81cf41b5575679af580b7109356cc7737d9b6778085. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USCGJ2345374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6be3815172c237f86ec4febd7febdcd53a29d07c1b2137e1034c8d1ac37507. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USCGJ2345375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeac662e21097e2238f44ead8d567c95c34ff5f79abbb53d55aeb6e620752d72. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USCGJ2345376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545adce9eb86256a3abd1a3adad6b8891aa10f90549865a207e0c0fedf2fd73d. 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/USCGJ2345377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9985cc7e3f3c173283ddb77f96fe2530513d5177816fd65af3e12d6a1258dbf7. 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/USCGJ2345378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0b2df7dee7794d0c6c2ae0a92ed5e1f233ca11adbfe7c0ce3397795370f4c6. 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/USCGJ2345379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b35ea3e44abaabcaa8e22384acf00fd2a8b782350974a3f429a418558a469ed. 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/USCGJ2345380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84901bc705407e3dc0c4f937d9032201dad3a93e74ba40c8e0ffa7cbd7d311ab. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USCGJ2345381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56c41e242cd334f7cff437a11817b13a12e05236ab67c2abc327e80782da25b. 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/USCGJ2345382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847f5b25ac91e5b95fe26517136f83abf2be19273d76e829c7249efd3f05d543. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USCGJ2345383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27ae5af744249705133b230a00c8b61a13764e87b865feee76464cdcfe2fe5c. 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/USCGJ2345385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da7ce2b534d04e3643fa8295493301d5fbfd9b5cad68635aebb69301614cd74. 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/USCGJ2345386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835b8dd4336d75248afe15d0856bde6c76192926d5869ef3e29c2af3ce6c5581. 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/USCGJ2345387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdf3f6bbe3d48a5c2bc57e3e67f32bf4b4b7749e8cc52ef101f343effb51548. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USCGJ2345388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0f199055167ff97780f90222bde4de5ba7c42f5bc4a49ee996bfebd1460ba0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USCGJ2345389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2950ceee1977c7f02a9242f07b7bc3ca099c28363957915ce798e17939e14dbe. 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/USCGJ2345390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc0ccc69570c7510ab78e7f95a72b14bd2db50ea7fbd580d9cb117b5a879ad2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGJ2345392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64890fde691a63bbe246b41a1f835e5792110e973c3e06fad8f8427a33fdd39. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USCGJ2345393.