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 0x205fd45bf88ed67bb5b30c6acb0618bfcbf08d675866fbeba1e9a3f1dd3a87f0. 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/b73b7b67-635c-4ed8-a28b-70fcd7fb2ac6.json and https://artists.proofprofile.net/proofs/artist/b73b7b67-635c-4ed8-a28b-70fcd7fb2ac6.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 0x6b86a09f291ef61380e1e3c63afb25380118e5d01486847414114d9006507a8a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:35Z), 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/FR0Z50089757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afcfe1e497e92676978a42e93ab6fb9d6972e766c315b56d873a68f20ed5bfc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FR0Z50089759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72f1bb6f86121c807c26d03f477dcf519d3629257b1c568c5798354482ed397. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR0Z50089762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40af880aaade709de7a1deac767509795fd8e061c436bdd12f2faca2246ed77a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR0Z50089763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadbe156a4fefb388af3a7f1d8727554ca2cce7d53eca494e4acde5bc9fd3608. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FR0Z50090219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709c0e786e7c6cd803a403d23977ff6f6e5d89989abdff93133c73699d69b514. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR0Z50090220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa0a3d9fa9abbee95428a8fb5c4bdecbb19d2b6b79ff6ec72d177d8da6c237d. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/FR0Z50090222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2907fd44938b578c0f4167ed56b8ac00ab260226a55b3ed568e4f3b1eb45b34. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/FR0Z50090223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d9152bb240a6978e87b3fe513443a214e3f4adda9f51c58cb7735e50fff0b0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR0Z50105851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9065c88b25021d60e7f116d122cb1a375e6428b30d8a1fdf5b241a56da450afc. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR0Z50105852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed478b7df2b69463529b1db46bef297f98dae4ddb415702fa65de7cbf17c24c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR0Z50106309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8b6138efc86d9088dfcf66d7a0bef5d09b7fb2f4fa4bf5e405e4750faa30c8. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:28:53Z), 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/FR0Z50106310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a6d8ad132582587663ed40b87d47ef1e1f3cbb1a61ecbd3e7242fc173d88f8. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/FR0Z50107036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaea3914486d1197dd5a9730af8ec122ff6e43fd3736817e2447f2d4a392d7f9. 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/FR0Z50107829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4aa3281b01d6f6c6c6d5b40f21b626f8362c765a338feb201f55e7c1410531. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:42:59Z), 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/FR0Z50107830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac202af1ccad365c70f9a6c9d80049b3cec5a2fce6e947e575ad8fdf3ab43ce6. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:29:05Z), 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/FR0Z50110339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1d2605813377018d8eb910fd5b38d5e823613cc05bbc45052fcd58981577f8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:06:58Z), 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/FR0Z50110818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a308e3db70b85393513ba0b15c5ed4a0bfbf841ecbcdff05ec4c8fc70d1394. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR0Z50112409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e291b6ff583991e93285f0fab2b273d7f32d5bc9ece076b5b09286d779658d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR0Z50112910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ee57d8a3301de22b3e985c89241f150a9500fc057249fcf1cbe817d161470e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR0Z50116036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d55eb12e0b28b79f81cb729275b07ad8ba417518973d6d007a2f0538c817e3e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:09:17Z), 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/NEKSW2400499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134fd235260c374efec57e3d8756719383ab1d67cc50f9420d832a79c9fb60ac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NEKSW2400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa2593964dd5f1dd5e61bff3db380b52a803da2ac739807b8707fdeca1cca91. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/FR0Z50121996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601a85ce069da2fb90b8c87e92586619f29ee89a8d695c1613c184d6ad316f3e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR0Z50123198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1904e9bfd8fffb745225e861c344a039fd364594befe66998e77277026306be. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR0Z50124892.