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 0x6d37eb7bfbbc533aa933c21ad5335e20fbd10872a58763ae47fea6ca515cdcbd. 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/9acaa948-d8b7-4eb2-9214-f2a1f06bb7f0.json and https://artists.proofprofile.net/proofs/artist/9acaa948-d8b7-4eb2-9214-f2a1f06bb7f0.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 0x94b2c99e44cd05839b3c7302f93911434801550ca6cbeaca7f249dc13e7ce202. 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/QZGLS1972053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeb7e07afa8f3d2bc89435d616e0c26454a1692d6c9ba0efd8029e43f03a3be. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USA2P2032538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573c97173cbb6859448dbaf8cb335ad5a1033ac211091397b14a8c7d46c4214b. 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/USA2P2033640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9297409ef0ad4f74a1cea8c0058db84e8ddb2ca5aa741dfc1a5b21754b8a0f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USA2P2035138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e76ef5f7c6ae0ba69e01f249b0c9bba0eb607972fd6ab92df7105ed8145276f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USA2P2036389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b844ff584b318a0a83fb14ca72f36bcda674453cd0a3fae2c6316ae17ae35d. 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/USA2P2030644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21601bb609043271e6bc08d6df5b475e7b9fa60cb8d79cc18ab2878b5c1da560. 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/USUM72204330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00beae2dcce2d3c6cb733745188de2fd53cda2568c6c2c76ca2f8e734eb2902a. 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/USUM72301850.
La Última Cena (En Vivo Desde El Restaurante)
La Última Cena (En Vivo Desde Chamorro City Hall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00beae2dcce2d3c6cb733745188de2fd53cda2568c6c2c76ca2f8e734eb2902a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUM72301850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a4efc85742c0692b3a545ff64bc409c6ee43764a0b4359859081e112db21d1. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ES5152300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a4efc85742c0692b3a545ff64bc409c6ee43764a0b4359859081e112db21d1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES5152300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea84ea5fcb4a4e63b41469db044eaf32fa7a0385b77b25cd22f8fb52cd5cedc6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USUM72112606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9603d0419ba1cf217dc4cedbf93d71a4af8bc62fe2692b0c9709dd37188d01. 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/UYB282385006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e31edd70129d2b789ddbb91b75bab9f7a85c7a71a3b12d507cd3ab9ecb2f12. 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/QZNJV2361566.