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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c184c037e9b94499168e8b0af9d71a4ce2d3a161a1997c1cef163195e59632. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74773b57-da3f-439f-9393-92a2f5f8b8e0.json and https://artists.proofprofile.net/proofs/artist/74773b57-da3f-439f-9393-92a2f5f8b8e0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5568c355e4df47a921df0625c2a45da680a1a43341afa8d849f41b82ea68943e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWQ2305555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d17e4dc129ac2b66a6e4426763331b8b462fbde9a51232db7e320a208a2abb1. 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/QZHNB2338710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48fdce78efbcc8841107c820e5606c89258d7ca4664caf96011ce10e43502f4. 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/QZTB62280434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9b9baeb0e4cd6a1e88cbbc776dddb5fd9d1a3f807f80b7e8f829bd119d7119. 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/QZTB22274073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f027d506b195f7a878bc1e97a70c686fb65b6703f9cb6e74d898cb7866216d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZRP42246682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78595a0105a8b722ee3a425eaf55b2903807f27212ddf626eef1d1ca9cf5a30. 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/GBLFP2278225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec4be002516128dc725ea6fb3a8b9b68f47cc76f03ad0c43ba575c42536c674. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN32250716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9374b3cd1901d9e4d4e963ccb6b5d6efb9d85e8b98b7348c3f4b760310ca400. 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/QZNWQ2102872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99cff6ea19529b5f655be297e6c4e8e0ed8c8dff16ffde48628834fd3db973f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6P2021901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7cfdcc8ed925719eb2fa52eee9a72df5f378be2ae178740302601d86e91fb2. 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/QZK6L2059665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788403a4915564271306116152e3af243edf1836248cfbfddc5242dc292cbca6. 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/QZK6L2059666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479add32e25c24dab0a26e0f69225a537e7f7427b2604efc122646d3ccce10d2. 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/QZK6L2059667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99cff6ea19529b5f655be297e6c4e8e0ed8c8dff16ffde48628834fd3db973f. 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/QZK6P2021901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7155a92f3ad5a637646e34538ad2ebd3d69dc1a95a6e38da0e617d62d76083c. 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/QZK6N1958657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd2e891a270b7516617452a890e1572b6c6455705098fc40c27b590015b9240. 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/QZFYX1916841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8884ad26813cb13adc4e39bd31c4c28e2d839404225990360f2cecc82dd73602. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UK2MS1805001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e96b48f4635caf07b6e9142b20c59943baa95e465331151f0c40311e3eb2a. 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/QZES62283818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2849640d6ee464e6d328b8cfac7adc61b409991189d25f27a28bbc091408d2. 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/QZES62283815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c4d1e9cd3008105ab3ba5045df20a67fefe9a180bf67be1e8a8020f9ce2439. 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/QZFZ62027517.