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 0x3e80159bda602e70fbd074827a318f87afc515a265c738317e688b602dfca82e. 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/6a53ebed-ff13-44e1-937d-986f8e70f551.json and https://artists.proofprofile.net/proofs/artist/6a53ebed-ff13-44e1-937d-986f8e70f551.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 0x291e6aa23dbe9f445611291a2c7d58f55af1bf5338bd1610b3572b244c9e62cb. 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/MYA110800133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731dc1f15d1f5d21b5a4cc4a31ac9d11eb8096f036a555d40641766824b13308. 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/MYA119900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbb6fae1b29c51d015b9508b580d3064ab1e6fcd1f8824a4be1deb29af2c1d5. 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/QZWBE2313400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91e160ec1f5c7788e50fe69d182317c2fe71d15546e655cb77f731cdd5b883b. 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/MYFH32310025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94375f514fbff483da0bff4b90dbeca84ad80ccc5b23bdca09c4ba9c2d254988. 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/MYUS11400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8335c927f53d8c0b8c2f68843f74387e7c84bc683b206a76ebe1a09d5afb57e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:27:36Z), 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/MYA119600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c686160c6fd91d6b49f83f57e4d6fd5ba32fd2a106875af0ab37816e6053831. 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/MYA110200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e583f26b8731cca4dbd3deccba982de7241234f744d0a31c4d725712eb7c4a. 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/MYA118300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89fdc9fede7018d8edb3a34a7728d51d22a2cf03e5ce89b23ceafb0fb0dcbc1. 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/MYA117900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396f5afbec8d5aece94aecf2378444d9e3e09f91ba42fcfb9d74887c0f419896. 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/MYA119000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242164911e9258dc2cc530698b9adbae0e4bda19b963b0bcc4cc7bdeb116abb0. 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/MYA119300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec41ddb6f4e6605e93c87beb4c1be3de0d55593bdec6d0e98a2fbdd9c0cb1603. 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/MYA119500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5dc21c5d29e2805746ed70e02aa2ee88931a3aae9b34c78f14a9515ec241b3. 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/MYA119600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71697370ae276d489b9fc550cb6dbeaee08356e830c1a467be309cd434a404b7. 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/MYA118000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298d2355eb9d48bd8c36cd1ff965a2bc04abed7666871653b9c59a95be4eed69. 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/IDAB30614039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc84aa40c3ed68a7b5489ff460b0384b1cc3b7aacda3d7b11cb6ef6848cc7756. 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/MYVM12500089.