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 0x0375edf059a44bf12697a340c681fbede31b6556a183d50a86910b217ad4944a. 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/c779873a-eb7a-42a4-ab9c-90053bd3b0d5.json and https://artists.proofprofile.net/proofs/artist/c779873a-eb7a-42a4-ab9c-90053bd3b0d5.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 0xaba49e3c13e750c64f7c5e43a3f0468a7a8ceb124f8fe152fc21c7b37d0a22b5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6L2246462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132c5e4633d304c4cdafda801fd80aa8d454ba95aee5466931152db0552263c6. 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/QZNJW2190087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a048617f1316c132ac926c0f8c2345b4cbe7ee81a65518f1a50ed141a11677. 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/QZHZ42217160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1bbc83c09ee4ac5f95603bfee041bb79082d3d2eec709c0c3fca00a76fe0d9. 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/SE6HN2450536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85941c6dbe4dab1231680d3521524e0e4c226ac4831cfc357a789840cbe418e0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE6HN2450537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58efbec752c5bca89265e95ec615fed5a8ade37b0b1351351da98a809156141e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJX2482008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6117d178157ed77c6e89d5e6f472a95cc5d01ba1c5d3175a43eab0d2dce29ba2. 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/SGB502310288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9810cd86deae224ddb867d4a584a8c90d7fc0ff821e0976c29e4106cf1a1144e. 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/SGB502310280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559052c17ffc3fb8326ef77bd301f3fa897361e76a7bfccb919121cca5c0c722. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SGB502310283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b373bf73dc4b51f0605bc169daba5645f3e11cac1f77fe9c7fd72c0453fcfd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMANG2254446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed3bb8afeeaedf9fb16b479bc2409e6626255830e47844cea27bc238f1aeaf4. 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/GXBAV2390476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e49a643580b32fc249d8f4c928c52442f1ba3f07d0284b77e36d6e9245d8b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB42417557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44b4ec7461cfe18cc29b82044fa751c3b3f7d878096c6c882667e5e3b34d615. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GXBAV2277672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca823f80778358565988978f02414f2b5f9cdf79ac7efd79ef62da08af62b7b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GXD7G2336420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d72dd21add0504d0fd92cd6968494d6554cd3016ddd53e572abed838f6b84b8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2472426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274746b5d488fb773c787c5dbaa5da9a80f0f1aaead074940a1bc1c1f13d652f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJV2461914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3a0bb56ecbfd2e7e624ed4ecdfa34f091233480ffc47bcd667539e5f44098f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GXBAV2493243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87342ad80dcb064763d863688f8285c7c36b39369469e5bef67a2a067b2ea262. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZW9M2312115.