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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 0xa8521fbacf1fcf9b97886cbb9d0effd8f73ffbc52beb84f917213ad7bf7e28b2. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f151253-db9c-43e7-8717-e9b13ecca665.json and https://artists.proofprofile.net/proofs/artist/4f151253-db9c-43e7-8717-e9b13ecca665.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 0xfc87b8a1786862da05e01311718920a453288f078296b5eff57252712f7650c5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBFFA0500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bba89c7296bd1efe5468893c3fce32b5f48913a34d7c20ceb8e20cf2037ef9f. 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/GBFFA0500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e45a9e84de13dc6d44e9a0b69187be82bab03de59d9597485d83664fcb1b4d1. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBFFA0500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6562aa26b4c620a6e1b05c3ee9b7e903eea1efdc32ab92c3c7a934704ec004. 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/GBFFA0500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bda96703208372fdcbba10d3a8ae70528c33dde8742c0dfa115698be753a54. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBFFA0500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670f3748f50ef5446eabd551cb52cec344a8b3a8476cafaadfa78ff8d5feebd6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBDJX0000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebe0770692c8691a142857b732af0c1684a0b9e925a6b1e4794a2a32f623f69. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBDJX0000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d64ae40954d9526bee42976c6e77053e5e013331c79d2b68b2eacfd7e34624. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBDJX0000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1416f78d9b93b38f83bea6b3fea35fd40fab8b695955b297ac56a64250dd219f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBDJX0000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1fb02a2bb4e0f26d45668c4677d07df851b49b71e09d0f5678b42f563ebfd4. 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/GBDJX0000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd095dbec8ab8b50f91e5c93ba7f12445a2e52814693022a681cbde3935fe1cd3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBDJX0000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c178a381602c11bd82677a6ff7008125bf528c0df39bd5e2607463328c1061c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBDJX0000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d099d2ed3b8ef5837994d88d60a296adcc902323f0e8da125f85f57a8b91d5. 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/GBDJX0000146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd479945b427c6e1eb10cd0415523cf272f1655f1acbb8b915aa3d4e345a2782. 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/GBDJX0000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeda9d60ddbd0e47934c50b2c8d19bf08f815386977d34979653b72a77f39770. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBDJX0000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1775a4147c16b56ce7877944ad0956317be8a0a8324d308b04254b7e801996. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBDJX0000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e731ac5019b7c4b04222d3e76c6c9f074032a902c3adf1bbd52b756e0223d62. 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/GBDJX0000148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2236e6bb2cd3611ede606d93c563cc329f9724f9199f721c71710bddf72c165. 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/GBDJX0000152.