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 0xe10cad1bd8b39f8622503c27a4cb7bd60b2a36497ea0e7797e17f92f1560c1ac. 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/dc69921b-fc21-4310-8a5c-23600e670ce6.json and https://artists.proofprofile.net/proofs/artist/dc69921b-fc21-4310-8a5c-23600e670ce6.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 0xd7a2c6ad4c10a96e99c5dbbaf5a23974e8ec8710d8ee066a00192fcbb5980066. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:34:29Z), 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/QZ5AB1954498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387b543b681b388057c91de6879a837a16d9aca2182866528461d921ad832917. 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/QZHZ51911849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b263eb7cc59968e7c36bf14f9173494b315f23faf877ebff556c6894cca565. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZGLS1915617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ed41ac3a17b7f5c91da0fbeea57166aeb93ba6563d0c204cb4e80116a2ae66. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZGLM1920744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732d46497b182e50d305149294bb4ff96dc4f3c66e95511e3f04269050b5611a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:39:00Z), 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/US7VG1990620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec9e8c731f862b57b58bea61b6704ef53ee7e0f17e6c323517c5039420f59e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLS2050393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa001ba5bec86852d6f37b73223143e6e918eba7dbceed84f830b76858c891656. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZGLM2170041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae564ded7d03688480b618ce966f2bda833874ea16502604e767686d7d17431. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGLM2201199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb522404f0a24e08e99103ffc1bb1a7c61793d9c1929cc5598eec12dfe0e39255. 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/QZNJW2221150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0e1b5514fcbc59d90ec664ed49643812ad19b2c5d7b0606c9fb7626238002c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:15Z), 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/QZNJY2294282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe328b1edaf5103132692774c03a7df2356a0b84243a30ddefff98bedc43cfcc5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNJY2294284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d34655696974462ff82ac34769003f959f28d0c1ab85139e0ebbf405bfc311. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:28:28Z), 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/SGB502264874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065bb65584270f4c65933e8e0a5aeb86f3191ca9dd2866b3291f47f009544dc3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTPX2301397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe686da3ee07367c115057089e413be2a9d71a060b87a1862dd10a06d767e01b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZTVM2398808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5d2fc3deddf073bbdedb1780a31a73166aaae27aea8a9f2c9ed239c3701f2e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNJV2497599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf3fcd23b8e3fef0dc54b65a9e534d90e3a5314f1651f8e22464908aa5cbaf6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJV2497600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448d7c862381834ce2d4e2bb03a071ca430f3814a8c7bc809f3c845820837050. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNJV2497602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baed176269102c49668c5c64ef8be817412ff437c3db95aebdf1e42bc2eb7da. 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/QZNJV2497601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3fba0c4ccb9854ff1e2ffcfa527b3e706ce27aac627f0f0d3980bad5c9a846. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNJV2497604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da430a0205b2a19fe5a4d1db9edcc29dcfb49eb2aeed87ecca3270084071ecf. 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/QZNJV2497607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f81cc56c42ff8ff2e43da6db8f971cccda797f9d73ccdcaf29e3c8c5e8f44d6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJV2497608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e0cd9e435b30a4e74c018b27bb42408de591064f8a470e5bee1f9399ef57aa. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZNJV2497605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833741e664a27a7c40571004041bcca03c92529fb8a190105b61efe307b5bbce. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZNJY2499724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366594527a840681fe75700b1106359e32ec88054854140d45a36b233e14853a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGLS2583611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98acb57a8634780746709ad66cf3800d622526aece20a1bf8bee18df1652987. 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/BCML02200035.