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 0x40bd5a3823f2960e998e168d825c5c4c48d6ed7d73d5947b715c1718d59125ea. 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/a103badb-8404-4788-b334-ff21c05037d3.json and https://artists.proofprofile.net/proofs/artist/a103badb-8404-4788-b334-ff21c05037d3.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 0xbf6c9ae9d4fd07404a33c7419579b1983ed05453c77b4e26b98e0b973cb43217. 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/MXB952200109.
40 Aniversario Con Invitados a Otro Nivel, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5b028e46a662d85f7e3991fe22c141877dfc891dad18d8276c68cf696d8fca. 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/QM4TX2197442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55012d0b9232679709b4be450ce5085097af0208349d1b48a23dc2f1d8631e47. 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/MXB952300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa5dd145b6dfd62154391a40986d5151fa6751c60d0e5032562431c7500d99c. 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/QZ9QQ2300294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ffefb5691233813c7334cf94cfc3ea55636a40e16394acb1d8a9c17ab6bff0. 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/MXB952300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7e76773b9dd78658a9c6c317243b8ea1366635fb1577f244373fc6423f8d74. 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/USE7D2300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9c06df5f237ad78c51b44aa2e18b4d104242c3464865e951af1acae8247d3e. 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/MXB952200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6605170652426d5f541393cc8f11cc72aa0bf45eb9484d78ec65a1ee9ef74013. 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/MXB952000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde226a36d3f4898bd15a888b30e7628523b4e84e7a1c8f0afbdaf30b2b87216d. 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/MXF202100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d8a7bd2545f7a572e1f84db8beb8af2c826f07b13fd02ce36dfe5919314f86. 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/MXB952200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7710100ac905ab849a0675bbd68bec31acccfbc3de83b0c0b494a5cba6e97262. 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/MXB952300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd9b155c99655410be1d96d063077a3328195b034d8186357d40a3c4e8f1972. 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/USSD12100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e21170d682b0ff91223cba3d39deda48be0035aecc64ede627999d8b92f811. 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/USSD11900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd9b155c99655410be1d96d063077a3328195b034d8186357d40a3c4e8f1972. 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/USSD12100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a7c6948141c31d38bc372fd7abe48ae3844e3a489a575fbc55339a007a24df. 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/MXB952100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2db9dfd9c5e5a4df4fa0c698bb3a86438b9b26b3f4b307f978f7211647aaa1b. 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/MXB951800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6d77f5e6984ec535c57a1f49e333c21ba2f61ab42a33edfc146fa0a25072b3. 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/MXB951900009.