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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3555bc9f6c7fbddb3e87498c103b7c9b027c2b2ba53218e919bb3b9e8c16ccac. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a1522db-c35a-4e9c-9a42-037514d68f59.json and https://artists.proofprofile.net/proofs/artist/6a1522db-c35a-4e9c-9a42-037514d68f59.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e311d3884a14b97a51519c22940720773f5a4496ac6edf4a12e7c0c4a314d9f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLF242210510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb278470c2a7694ad3dfded0de725a61611f24f7d04940e45130c2eb9416203. 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/PLC062376882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5becd9ff5140d81a5749a6d0899da3e88d84f997584f379c9536d2766775fb63. 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/PLC062244710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5becd9ff5140d81a5749a6d0899da3e88d84f997584f379c9536d2766775fb63. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC062244710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8c089ff8db01976588a387b3216f33e6bd318ab1f1ae04e570e5e770d368e1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB382400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae0524e054e08a60c039f0cef75b512d2ddf327c570891a45119c3990a4e889. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLF242210184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f2b4ec913352361ee9dbcfb2f8a0c7d9246b0021e65886772f0d62bfddea78. 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/PLB382300494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0709ae36ae0c2e1b3e582dc9227902a44f6f02bfa1bc62973cb6ebabd4035e. 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/PLB382300495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77acad11cb040594d52571c3a187dca2a6c6c6ea145a4b6d6c517628d73022e4. 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/PLB382300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21df2b8775131fb2d3e38b2f97c79695bb5ae5900c93f2bf42bc47f6c37ca67b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB382300498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbe5239ed4ff4ca760fd5f1acb4da85032ed77e6ebda9679866a5a415e000ea. 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/PLB382300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fff7d0deab9d81623b98dc6f1d3d017c54b24d3b6bc2c2a9da8be518b39f4c. 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/PLB382300506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1387043021e6f57a04e02b3230959c86c99a6c836206049152802f44ad3d9bd. 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/PLC062373370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef096bc363dcf2c471042246efa9eabd189257ddfacf6aa30076a174670779c. 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/PLB382500404.