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 0x208ce729f335d4d649c60a8c78323f9e21b7f78fed4d6c7c923478fb5be87cc5. 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/9a438fab-2053-4781-b455-85e39c66ef06.json and https://artists.proofprofile.net/proofs/artist/9a438fab-2053-4781-b455-85e39c66ef06.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 0xe4182e725c9a447876417e8044ec6ad2ca8ed3cac130cc18f5c786332fa64171. 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/BRZDB1900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1ab09dde8d4e7a47b05c5a907eda0b0f999ae0401bc73ba1a273d5b78f8ac0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:50:26Z), 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/BRZDB1900162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3aeb705e5a49aeec26fd676daca88bf5ba902edcae31de569d4cca9cac1cef5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:55Z), 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/BRZDB1900094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2920a7e4f238d2d21b49ccb5ac34e280a8e26a8c3adc8b59f4a3c08294a40b1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BRZDB1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44cd9834f37853c7220bbb93e7fb3fa2e44a36dce8a5924c13e1d55fca22466. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:18:19Z), 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/BRZDB1900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbefcf923142507804250675ca4ad04c73ea4c28521831c8d6346c698d2b983. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/BRZDB1900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e8866ab07085273e21ecb93db00d9d2c574e6e0c679d59018674aad885aab7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:58:21Z), 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/BRZDB1900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374a4533288d2db6517317255cec4b13fb2844c807ce052fa20b2f2e4e96d66d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRZDB1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b7f1522cc01f441d09c0a9acc034bd10c9f2340879f19ce16d9476c794faa4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:40:52Z), 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/BRZDB1900286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0addd76c732c4e5dffbc677502a7fae2c8290f2d6e1e9b7bdd131ceaba95d2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BRZDB1900291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f57d75d577f4de2d2ddb4fa2b8a48b10da7cf0ad773bc0d8e190e193832451. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:48:40Z), 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/BRZDB1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcbf86632100a7b9b4005b5c4c841c4b698a0fc90620ce0f5a229bad6d9926a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BRZDB2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc5abb7e35d655a13297571becb6387c3641ae2ee047fd5f30fcb5429a3e3bb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BRZDB2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9613c2263903b0357fe9b21f576c001a0213f585dc365d8ac4ec581ab5e2807f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BRZDB2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d97288d3bcdcbd6a34ff7d9c79c4f2973a64a9f7b019092e7f6efb769ffe9a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:46:32Z), 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/BRZDB2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0940ab91a27441374802bc4f300379ec66fd72208f0e835c3b18a63f21285123. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:28:47Z), 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/BRZDB2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e20caac65eedb67050bb8e7ab0de4dd31bfa06e46ff79998413161d8fd322. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BRZDB2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eb88ae9edd15880f1a2029a08e72e165e1f7ce8c1b5cfca3851ef70af37680. 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/BRZDB2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a492ff1f449c408b47de799a1078e2ce2c9f64fb2a245575a02acf97dda5ac. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BRQJM2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f3b48d9566ca3b7614cf65668963bff7580651e37edd45ebafdce39c3ce77f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BKNKT2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf68dbcdc245bf58c3c24b3d1e0edf73e9c4b9d091ce3a3c4a656a345c5b0911. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BKNKT2300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb45ec1f292bcd7e4d5b838380dbe98fd91ac1f57e23c4c33fbdd29b1a2edaa9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZW9L2474087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1db377802a72c7fb03b070d720b6dc96a7ef561e395fdf74b30301301c9f62. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZW9L2474088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54253b174f89e8f494dfedd90633902dde4e454867ee39a1b0d0e565450e99ea. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:49:51Z), 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/QZW9L2474090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d58c624c45cc42eb0d8fdd12577d1ac5c9400ee11fc9a090d4c9ffd5be1a8fa. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZW9L2474091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8b29b06dd6ac6cf39499ccd120ec52cec2cbfd65a45270138adc3cfed5a93b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZW9L2474092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11577ff60911a52e7c8a08caa408163522d8f24ad1131e2e36d7b71e0f50e4b6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:45Z), 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/BKNKT2501309.