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 0xf6471df9c5ece59f67cd73a8c571473a262241ccd0299509cade202c3aeb3166. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cc7c945-4402-4870-a79a-52a5aea09f58.json and https://artists.proofprofile.net/proofs/artist/8cc7c945-4402-4870-a79a-52a5aea09f58.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 0xf748432d0f35cb61b1db9f753a84004cab3c3ab1a495f9018a420d72c322a051. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJ3V2140833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166a8f817c5d18e8ae641d5a19ce0c41e10950464290b0c08bc0139cbc829584. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJ3V2140834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab53215f4e3542115ee83ced6345de4f711f0c588b837c7eb46d507b83373235. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USJ3V2140838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb100ea43a906dc08c692f56c50fd52f7381ec3a970e010b0e84fdbb3e532fdb. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USJ3V2140839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a117a7bdf58e54af9f5205b7eafd5e9797b52ce2e701f65f2c8a05a24795ad8. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USJ3V2140840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe183b8f63df1e11e2f4231f4be1221cbcb0dfca799b73d2894e1c7579bfb816. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USJ3V2140841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6833708f5027936fc41ad7d12579e959f6123a0d496df3936e5181e3e25d2683. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USJ3V2140842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cb82e748b16ffab56066e68548af03603c941fa7dff68f29707d47892de98b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USJ3V2140849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0222b49a60b7308cc1916d68719cebbe72bbc7f3b2cac08a5975fa9bf1c5ba2. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:45:13Z), 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/USJ3V2140853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f6864bf4763adfb65a2861ab6dab64c372f3f56a8f2cda9781dde702f9f6c7. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USJ3V2140854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4753a92111b50f65a638a98578f4ee011e902edd199c17ebb6dd4d3dc0ffa759. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/USJ3V2140855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fbee912d5ea87067a9938f9a1eeb56ccfa0769e0cf771f2af0eb5d019d6102. 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/USJ3V2140856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84d743aadd92d3e7e2fa71d1af64afa23d678852ded70b286e6b6cc0352296e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:45:46Z), 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/USJ3V2140858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae15b7942cd26f10304042a54dd1c9a4b2595dbe9f39b8c37e750e289b8c9492. 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/USJ3V2140861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3236fe11bfca45b33c15f3a998c50a2f6739408d9233cd627c0b5ed862edc7. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USJ3V2140862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe59f659fa297a3e68e1e8359688d970db6eb6eac1e8930b7c8aec5d99e5e942. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USJ3V2140863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05694494f32f90eef6a9cb5327edc9679210c01eff5c64d4d9df4beac693c5d1. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USJ3V2140866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bfd1c8eae0fb9ac4e67c5774bf18863346f77b31dc64b25d9a8c29145bea6b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USJ3V2140867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58786feb8ecb29c198b39c005d80660c0bcf406adb3441026fed70b8c862dfd4. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:45:07Z), 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/USJ3V2140868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1bfe7cccc23208a63e922044150cb0dd21b43aac5ecf7e315f6b6ac314320d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USJ3V2140869.