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 0x02cd5d5ecbae8a9b7fd84c58d7769d9181c9fd373437b42a4a132d8e309f662c. 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/7538fbea-16a0-4fba-9762-7ff65d8e7f76.json and https://artists.proofprofile.net/proofs/artist/7538fbea-16a0-4fba-9762-7ff65d8e7f76.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 0x9439f964aae3327197d4ccb72cce31fb240b7cfdb46de2d46f5d6e6043595602. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEH740700973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcf1a53a1cf1e5eaa7d06f3828220ea76d69ff6f013e144261153cfcb3f5ed5. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DEH740700974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7a51b44e6c379b0fc0c711d67e9ca4dc7ec2897740ac59855b08bf51ca7092. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEH740700975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447f66e438610d7ca1664e3d3ef326259a0ffd0f7d9b3f3227e363eebb623394. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/DEH740700976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355566d85f0c365585bf3b64fb680da566c6724712af8a82e9e7d2d4e289f32e. 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/DEH740700979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337037cf0423f8ef75cc5f2049f45ba824faa2df48d7cf474bdbe0bba87117fb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEH740902726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf503f2ff3dd94bfaf372dfe03429e5e58f16ce14d97ba4056eae11df1275929. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DEH740902728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb029a56a54eda7ed2e95bfeea6cfaf65ec5c6216b31fefe700c2ffc046472534. 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/DEH740902729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0b3d573026e1498d728ced1d1e0e3bf677bcee24073828965e70ea84ae57a9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEH740902731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d3595c5906b3051169afe9fe22d8b16b997e93345ffc6adabc239d807b5996. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEH740902732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c74aee9611b41fd60d6c858737458b10d05b154cd9897d5167eafd728b999a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DEH740902735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fa67f22d3c9d2ed2367a44f21c0ebcb728a8c5acd4027eef21f302448824b0. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/DEH740902738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d4b7f2784caa38da13980bcf74a8baa6e2f352d56af720863f073d2b594a2c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR6F31036400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d4b7f2784caa38da13980bcf74a8baa6e2f352d56af720863f073d2b594a2c. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FR6F31036400.
Here Comes The Sunset Vol. 4 (Compiled By Jose Padilla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d25fe28dabc7ecea32c4c28f1266bd1d6caaed5ad17e5afe7b549bb2ee2dc1. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEH740700977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5987735180d58b3f9a0f5606fca2d6233b553bfe39c74d497c7eb838dbc0dc9. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DELM41100110.