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 0x51192f32d81293b8ba11b3a164fbbbe04defb8cb7f77bd6a8397ca5920a09724. 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/93fa6fce-25e6-4dc0-b4ef-97f7e716d25b.json and https://artists.proofprofile.net/proofs/artist/93fa6fce-25e6-4dc0-b4ef-97f7e716d25b.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 0xcaf97da1ee9c2b30af314bba0b3cee5fc6486a08db21a8bca555486b0ecb7a99. 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/NOAGW2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d372a4e80188ab091c4565b55bc805be301aabfc3e2903e2e6199009d55a13. 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/NOAGW2300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236e8a0725d02c71b0ce05ec0523f0e017e76a086e351cd7c6c7dbdc9e9a6713. 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/NOAGW2300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3923ab2a0cb4a4cbf33b9801efa7aaac56d4cd66e35a4fcbbdfd9972aad1353. 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/NOAGW2300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1eb35a73e7132be4187107b554fac44a2c704a22dbee6ff87657c890a8d6134. 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/NOAGW2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f4972bbd9f8daea400fa0b6a243558dacf2b284237cd6bc573326db5944300. 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/NOAGW2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa34a9f74edd3102d6998068119ee444297fbc88564a5f44f25035e0c4c07976. 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/NOAGW2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b0e472977ebe9a62317b6b0529ae17163b76ff5c4969825772c012842b986b. 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/NOAGW2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd44f3076622fc5a6d4a705afb3ae12800f5531259b20eec702693a378d62a. 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/NO62M2201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1eb35a73e7132be4187107b554fac44a2c704a22dbee6ff87657c890a8d6134. 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/NOAGW2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f4972bbd9f8daea400fa0b6a243558dacf2b284237cd6bc573326db5944300. 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/NOAGW2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd44f3076622fc5a6d4a705afb3ae12800f5531259b20eec702693a378d62a. 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/NO62M2201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b0e472977ebe9a62317b6b0529ae17163b76ff5c4969825772c012842b986b. 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/NOAGW2200026.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b0e472977ebe9a62317b6b0529ae17163b76ff5c4969825772c012842b986b. 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/NOAGW2200026.