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 0x07c10283e951737a379a824174187214e0d3f52cd379160d7ac4716e596e794c. 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/86b1449b-ce85-470b-906a-132af0ff990e.json and https://artists.proofprofile.net/proofs/artist/86b1449b-ce85-470b-906a-132af0ff990e.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 0x0fa76a2aeb1becfebe08acbb4193d704df4b363c74777e707ef4724048e92d3b. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GX4FT2409002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa76a2aeb1becfebe08acbb4193d704df4b363c74777e707ef4724048e92d3b. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GX4FT2409002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef47b3e283b0fb98c360f577e44a0877cb74c063ce584f68da275e260092be3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX4FT2409003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7675551096c5b050c1d20f2dcf30718466d8a0b244a9d039310b7b25bee654. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX4FT2409004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7560635813a7deb5d8275465621c563f2e1c9c668127bbeff8671a4cb50816e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:09:53Z), 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/GX4FT2409005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9504aced98b0f8560a2d06dccb7b607a64072eca5bcb852525929df688e0e72. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX4FT2409006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdb8856a6bffd9cce425525f7da72d0f7feb035340d5016d836331dbdac8e4b. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/GX4FT2409007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde10be9ebc5600abc3e5ca545c3278150447441584f6157f319d804a8db4df54. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX4FT2409008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf94335c7aaa5a31d95604c684649619b818a78e96df0e9166440b97f27a7f16. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GX4FT2409009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40965dae0987857b7392bac6171969a29cbc9faa12b7e9b41c63900fb007abb. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GX4FT2409010.