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 0xbcf6227614e27fef73ea4477070ee26c4a788f1fd7d6815628cd17fe0c973f5a. 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/3da4d45f-8064-404b-95d2-debbbbf4b3b5.json and https://artists.proofprofile.net/proofs/artist/3da4d45f-8064-404b-95d2-debbbbf4b3b5.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 0xd01f187e8ad5e03e08de022a7f00b545619535f4c00f499906d4c109ec15ad29. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/MXD782101249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68917fb9202ce7359bf5a793617985bccb8892ad7f352931ad76a7b79c3f8ca7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:19:32Z), 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/MXD782101247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce2629aac4e52001c06d7432e18c238e3782c796d9b43e9696a6b7c669e4076. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/MXD782101242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9450211880783a15a2428750e3fbb8dcd66a2115b1c4799eab084291c6c8fc0f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MXD782101246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6500093e127cca4800477d4133699e7f37af92781191e2eeebf75658e5db8e12. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:37Z), 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/MXD782101239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b3900dd41a67e111c850e5829ee65f43dc9c5c6fbfc0fceeaabc157d6b4d5e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MXD782101200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe817acc7be3c54c65e1372d1ed015231a42078b6dc5f6c829f44251d07aed2ef. 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/MXD782101232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dc2ac51e1e8705c6a40586f5809c7c270f4b3b1ef3a126e18f52ebe21eb9ac. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:04Z), 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/MXD782101241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad44b4de392dcd653b4a0014a8607beb9bf74c3f2871403c7c273dd5b979348. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/MXD782101231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a29ec50a82ea9546efce09f43f67bdf0dc848bb1c57a125cbfebb31ccf52e3a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXD782101245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c17c74f06cafb23d4a5ed508dad380b61e8e4c1ae0c679a69c4f83743074a86. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXD782101238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caebd68c803c1e90b709032187c7939c5788841670fd7bfdafb4c5ea65fd8a1. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/MXD782101233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa102e5b52cfbf258fe4fe6ef4c5d5a794875255db7bf8dbe2191a5c4fd0bb560. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXD782102625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c817b463e2f1c84c9677388c8c66fec25c0fbe88543b3700a1f338f5a178d48. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:33:16Z), 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/QM4TW2442664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99901ce368fda71fab9497b487be14e9c4321605048fa5385f4a7f7e46b7c99f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:36Z), 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/QM6N22408339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398e768b41c8145aa3dec24cb0c97952e069532cdadd13ecbdb51fe239de7a51. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:02:52Z), 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/QM6MZ2401033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce61482520601e5a2d2e78be4e6e105d72096fb5b2c85936c1ffc4b6637eb1. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QMDA72407290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e1e80ba3508c7bb470cc33650bb9ad217c1bf20c0ff3afe363549afbd42f6c. 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/MXD782102897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80e1be2e3774e26c6afd9b3a20905b810c0767072524e45c1a4392f0cf9abe1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/MXD782200256.
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