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 0x737bf04c7f61cfbeaab2aace73f132144765adfa3b8c09ec01250e8e2e1f3c07. 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/9cfc05b6-59d6-4b05-93c8-6dbc08293536.json and https://artists.proofprofile.net/proofs/artist/9cfc05b6-59d6-4b05-93c8-6dbc08293536.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 0x20f00c35a626f7af725d39459513391d889ce3bf7d7a674a85b02bf2cb0f9d7e. 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/PLUM72000463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf7ba2d84018d1c2fc65662aae3c7cf6bec0b3e4f5f9416e5d5e9e835e9a6ec. 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/PLUM72000327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e7da70e14dcd8b66c931a2c9b9797b6fc9154a42fdd08ba77e32b3810df5e8. 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/PLUM72000464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7062f13a785b422b11c51ffce7b2a0f7d315185a1703fe243e3773f6dc00746c. 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/PLUM72000465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2528a283147c2b4ba7fa4162f3bc8023d8d7be3dbc3e56300e72d1dd56f7978c. 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/PLUM72000466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b0a3097c05a89baddf892bdebde44ea5e693e93037721f30b45be52f4dade0. 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/PLUM72000467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f72f97f65ea3b7ff8a678dd9336d72ff400b3c388b204279c42fb5aa7ae210. 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/PLUM72000468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef40cc2bccff04ecfedcf599e0292693003c05778529c0c762b6ca4964a1432. 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/PLUM72000469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259eb04ad059cc147c3f23d65b14f3d6af7588da16825d47a53d9778b69ec9e9. 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/PLUM72000470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c29da0b3e734f3335913138a7a369d015d45e65e801e8848673562defbf84f. 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/PLUM72000471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f8884de4a6069022ca24f2a06776e3c7bfe0095c3b7c2153459cd0a7a92bd3. 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/PLUM72000383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e89eea8b6c8b96b6393f605b80bc29a9fcdbaa30715c515a9e334e91a292913. 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/PLUM71900669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dc72971fb6b4ed14ae170eacbe4270ce6b60f35d5ae5a866b21936d7449fec. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/PLUM72200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a8da69230b7ab8759e50e35b92046732f7c1c74ba357e43bced9285ae97497. 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/PLUM72200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f176e04d8d83b3e8e81853f466e4a40796264221fc856cdae0acf404355430. 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/PLUM72200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a48926e32e268ae31da69d340d8bfb1fc229b86152daee4aaef0ec6afcbdc30. 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/PLUM72200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa265dba8ff8deb48286c1fd1477cc5aa3f21aae70f1995fe5bc9e1ef063616cb. 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/PLUM72200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adb870def340078b94dcdc54f52092b5c5a4421ab1afd3a6bd2d01b77fb6c86. 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/PLUM72200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dc72971fb6b4ed14ae170eacbe4270ce6b60f35d5ae5a866b21936d7449fec. 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/PLUM72200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d23fb40f087acc8a0886cc16e99239dc3bddb68c3ab71d8b69acf50e2a3593. 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/PLUM72200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334fc5abaa100e0fd492693376c65f571f86bacee29ac849a02cf9b008ce3df3. 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/PLUM72200135.