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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cd206b8a8802381d65af52e84be2a0df6124cdf4bd1642654b7b28ae7ce772. 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/6256e881-487b-4145-b728-a0b0fd7332dc.json and https://artists.proofprofile.net/proofs/artist/6256e881-487b-4145-b728-a0b0fd7332dc.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917bc498dc85cb73f92b5f3dc30a1eb3063a20f116bba8e6b319ff673b48ad3f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJZ2192290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba08848894e760562846fc8ceb73661c2cf990f5557cb0b85bccd508028dff8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2263628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ca1ae7855a09e58563742d648862796b72d1630e3f05291be44eb260ac34fa. 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/US7VG2199371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce857ebd28f9edd33aa94f2539f826baeec23e7efabd670566a75d33841f114d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2415731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c016f6ace7c6765938d53b44219476272370d2130aefdbfc422e5b3400c06. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTVM2485324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed2c5b51b9b86ff24c6a6d536a2fbeab8e8da9dd11fa1f082151b58d369901d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTVM2485323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafab03213e4cc3e7c0dcf8d733946bf26d21f11a99387b608f230991360a351e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTVM2485326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e67a31f174b17f460161632751a0973a58deaf818332d51bfba75f983303922. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2591899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed2c5b51b9b86ff24c6a6d536a2fbeab8e8da9dd11fa1f082151b58d369901d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTVM2485323.
Super Sleazy (Igual uma Garota Francesa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c016f6ace7c6765938d53b44219476272370d2130aefdbfc422e5b3400c06. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTVM2485324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafab03213e4cc3e7c0dcf8d733946bf26d21f11a99387b608f230991360a351e. 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/QZTVM2485326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24dc5afb3b014b21be26d7d5461aaacad7004ab94637521c660681ff6917045. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJY2447144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1affb6cfb5857d36a56ce5c016757338437795ddf9dc66c2e42a6ad0ce009bf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJW2471128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3290cccdd9221a84f08d5fc959aab294c22a6426dc06724e21d3eb2b2e1f397. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMZ92463887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc086f6e6fbbe5900c7830be0715a1187d7b81c60f5e7ba4c7c81a318dedb4c7a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLS2403366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117fcdb328949f1c7ed55f9aa74281f921f56368d297c6e48493e119473eb924. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2471127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1affb6cfb5857d36a56ce5c016757338437795ddf9dc66c2e42a6ad0ce009bf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJW2471128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba6c48f20b5a27a643b787871201be2e3f856fcbaf599e3700edf1fe4739d9c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2471129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2efb43509b733f596a3415a24ecb324458b837a9387ee938920bbb44b847d8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJW2471130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831a9943585e4c116e5d84f69b5591aba4dbc874f06258386d62e6af038c27eb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJW2471131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3cd23583f8533dab2bf1575f26e4d5d139212e5e93e2776a76f0f5f4618024. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2435906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e41c296f20346c92ccb500b3622a35ea6e5d165fc7fc80b7e2c48e062cec1b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJW2471132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274920c2157b6619abf989bf33aad7a95a976550095cefc3d1d60ce301eb8704. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJW2471133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c907fd660f630a5341bed3dfd0c53c81633905eba6c3d902d2cd6a59b00fc63. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJW2471134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab20a5d4c091e3d18357b9bcd2ec3b721cdb0dd35f56f9414dbaaa7aa5d5a5d4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QT37S2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5064838be167107df9924f1c1a8fcb91caf9f554acf8fcd4cc873286e236355. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKEHX2400020.