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 0xd6329a6c8c634e1d80f84622ed7fee4df17d0f8cd2a4ad6852127f8128443709. 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/329a4b28-fec5-4fe8-9212-be1112f43715.json and https://artists.proofprofile.net/proofs/artist/329a4b28-fec5-4fe8-9212-be1112f43715.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 0x59b4a1d92ac4c55f755e3d4e2cd54a889cb6c4c64c5d9f8a73839d7064202142. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTB22297486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4179679051dfcf84e6250af2858e2a2f5b57a8865b6503d3f381579ada836e2. 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/QZTB22297488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4618b5b10ca6820713743c77db2b9dd76bac46f8d9329ad0fc6464fe999e6a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB22297489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b39f8d2222a1c07700b2c07c86c59d4e1f5f909b45245e8046986e1ec30adc. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZTB22297490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4785e05e4f933250cea38590c88321cbcfb7b368db98fa3784153d48cf03efe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB22297491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0100eec37151fd402818ed4ac6da7220952b7fe3025e3940c44da98eeea4f5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB22297492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceb8cd70fe2e9d3ba276884575c693a6be2bfa40e52d0ec0bbfc0d186e4b6a6. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZTB22297493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce2d6698f89f26bbd386b715a1af4509b9f084fec23861a329ff2a3b2e2f3ce. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZTB22297494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f817f60fef628920e561a6c541d7d3849662696c6958700d5e3aaf67ed4572. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB22297495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e360739f9ac960bec03946413d4d356b131fa75d5e3435234638185c731060. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB22297496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4319a89135d81305f26a19a984b1c6b197d91d463681bcf4e7d7afdb09807c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZTB22297497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d2202d20fc29c997202fa7f3c09763acd0fc9697c356696ab4c67eb73c94ac. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZTB22297498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215bfff43a51da23d5d697085e7395bf6ec7588be2cfdfe75bd342c53cf287f0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZTB22297499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d050d810c2cbb4f786f9b38702a75cc755e145bbd60ee735fff917393aa8700. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZTB22297502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8c41267a41c3ce9cedbb095bad9df78be7b1ae4d909e697883bde0fe4cc410. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZTB22297504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31cbebb4f5006b556d03a9bf9d4479251a38721ab823ec1f638ab7721e5266a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZR8E2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd01ebd8906e6e39f9c303f283d9e27dc919dfa2e8d5dd971f8b58c1baacf49. 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/QZR8E2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5d09087d7a3984e57bab8d73ee05dbeb68be0c132f3d3c0972cfa46e7502dd. 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/QZR8E2300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eac8c08ccb6c25af5fbf6b6625c382d887e342909d73cdc29d0d78b02981b8. 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/QZR8E2300081.
Fragrance Of Your Name / Light Of Your Face - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c446a8e945252a20dfdea655362e79d793fe595df21dc23100886a0db30129. 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/QZR8E2200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf9d2e9fbe086e3b8f39931e7340e71780ce815d5dbcc413a97bf1bb2da0f3f. 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/QZK6M2253101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96697b26ad97acbf11552a64e6630b916f7e4240925b0ce44c99d5706f0ff784. 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/USUM72414582.