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 0xdd5af4260e618211787d12c688006bea5e5e1ec827a17c15199746643fedd078. 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/c476ad09-5e70-4515-8909-ef8b476f0741.json and https://artists.proofprofile.net/proofs/artist/c476ad09-5e70-4515-8909-ef8b476f0741.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 0x545f1952b24a862a192f4cc23c323ad625691bcd82d3386b5a7eed7531b3d093. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UK8KZ1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0cef5eb35799b7cea6192350bd1e8af20280421f97fc575cca983facb61fae. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UK8KZ1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb653a880e6acf412097854d31d98cbb01a2454e9b867f123b21692f62ada6790. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBHYY1200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b7a7c8a1dc9edc6131cc9978ec01904b545c181115cf0308439e558a92e093. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GBHYY1200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64486e2ffb835958164792494c405ed42c816ed4677eb9496e3b4fb2ff6e27c2. 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/GBHYY1200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4400e51b14b7a38b316a81b40f5ec54d3dd73f9f61ef21986ecf3860468b6c39. 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/GBHYY1200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310e1e253b79b720e38ce7823f9d8d02e45c2a38d21932902c550ef68a4d478e. 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/GBHYY0910080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9469ae7a8d63c41d4a3f45a0c8d14de442e021098e79649e2e22855c71f654ca. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/UKFGV2100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aed77d24360bde4072d94bdd6e09745b1111b8b90b53f6a84c8578ad996fcc. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/UKFGV1900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb546c21b8dc77697d3acc1f49b9ee68ae92a736cec32762185ce0db8b9c3a893. 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/UKFGV1900063.
Sex Music - Win Butler's 'Knight Rider' Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53c22d890eb4a81c7c583e18aea214d91a0ef5904ea0144941ae0e8e129f17c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBER71700224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caeb7bc4e59913856b43f733f6d0879b1133c9a1fab57678ab941bae5de1253. 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/GBHYY1200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35e6a5dd21254f3cc2bada798c9dc375b92fc0b2e89d2dda22b883575841433. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UK8KZ1500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91695d0c5dc62333f825c8a1e69f696fe35f643ca2fd22dd254a003d6c65db5. 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/GBER71800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d1a1ab88f2ee4d5aaa98debcdf8dda8caf90366db2a29f9f50b97093e846a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UK8KZ1500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58571161381858da7d0ded82da725b539b5ce5cc2ded6e3825e74e38090e62f9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBER71800020.
HANNA: Season 1 (Music from the Amazon Original Series)