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 0x579205ca84a0f05ebb7dd495652e8347930acbc390afe6feba1a4dfbabb95057. 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/60b05e39-cedc-474f-a538-94d9041c27c6.json and https://artists.proofprofile.net/proofs/artist/60b05e39-cedc-474f-a538-94d9041c27c6.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 0x0301233271119e63038be35ec25b039b1b0ca5b7ece4bb00757f233ed6ae9953. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UYM122200001.
Cuerpo (Canciones a Partir de Mariano Ferreyra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32e69716d88267cd4f890d639502ce7584ef3cdd4d032a930a8c90051f63663. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/AR9PJ1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbe4c9ced6be0ae31bf7b87a98cffebe3ab4972c5f59d5f7534b61e58e1aee9. 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/UYM121806503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcbd50b931390720c260df6498dc4069177ac1c6263fbec6352c302b25f3c27. 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/UYM121805271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8126d981df5fdfd087fde574b8a66912cd6daa3f641ff4714b1c68bfee13ef. 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/UYM121806505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd44110829a7969507fcb3d6970fd559c99b7b825d5fd836254226ac6612aa0. 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/UYM121806506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c65e0fbc511e2b65b7d7ac43213ddcfae89e727951b0528281058c734b58d. 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/UYM121806507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd232ac293e0130df06c470f41d60b34942936099eb765d82668db1abbf70a487. 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/UYM121806508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8ff12f7361a253b49dc1fed371c69bf261c0c93ca6a11d4289835eb9fc4547. 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/UYM121805272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f56c31438628c5f361f32fbcd3f6cebe5f6414b7c752f139546c3599a60b8b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/UYM121806510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e2c2002a13d9ef5dd2bf7c187339b1c9fd44a658604c6f5dd3a98acd1fb1ae. 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/UYM121806511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95d463fd0f7b5ef56657914eda58e37afc40c967af1eaae7d039716e74ee705. 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/UYM121806512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf1089ac6e966fa0d2536b7798f727ad6ab7d4c3f866b0deb806aea0d332347. 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/UYM121806513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9273aa46e3a9ed425267ceb445b3e49039dfe39e1ee134c76c31ecee71203a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UYM121806514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981ee9b6eae397e2800fce8dc9f83402dd1d1df985d34e6edf563f5c8cd5a96a. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/UYM121806515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b88ffa5e27f48772f7a4be66d12665e081c5583e7ab2747774f71f2b59882d6. 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/UYM121805240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3b6505f779f15da0281346eb73ce7e97b4663c13949d2ac9d88739ad6dc5e6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/UYM121805239.