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 0x208c6e3882815a4f5cca57118bae55751fe3d90d77cb3b67862a97b98e2ae328. 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/4e284559-5ed2-4e26-9282-b2bc6b787efd.json and https://artists.proofprofile.net/proofs/artist/4e284559-5ed2-4e26-9282-b2bc6b787efd.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 0x9e7048b8eb1c289bbfb40ae7d3a95a15dcad30e01d1749fbd89a6e0ab7383366. 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/USLD91753713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c577982aa916769e0dc7d53b764c340bd868927488108dd6f8deac814772269. 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/USLD91753714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61422929cace8637e25e104490c25a2bebab33c0ab274ee0ad278e6e8ecdc3b4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USLD91750824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be1f319d74ed29b60e3faa2983ca66cbfcdc9dc863a7631c0f7250c3c9812f9. 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/USLD91753715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8028f42f4f346ba9bd0f42899ba369e79cc722a4892a71610d630b995ac0d6aa. 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/USLD91753716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61a5db05d06a54f8ec22ef4e055105b16a8641148721250ad70460ee2e12ae5. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USLD91753717.
Black Sabbath (feat. billy woods & Tha God Fahim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6d8d477f78221fe9fcfdff47c80a8a28e901c4b9ac0c8d655232f19bfcbaab. 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/USLD91753718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776c9bd2f5c52bf93c6aa5914d259d3122e956060d8a77cbbaec170f2ffa3361. 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/USLD91753719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf83b5bb29cd14cf0142b6cd8e4dbcd0c31fdf5a756a2056cad3165eeaf928be. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLD91753412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecc6941d0d51ea6de2f1fcd4eb78790e0faaacd6ca20818c6e23c166a0bc2c9. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USLD91753720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c85a544d893ec8c7725b746e3a2d805f00feca5ca4c1c7a3eed6469440084d0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USLD91751137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab04e7c6687fba855fa34701780f401f551d1f0fb92e5dd3f652f84442fabad0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USLD91753721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b05487e3672bcf097213145be17fc2da703e84d208c6ed11522c83e698585b3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USLD91753722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18be83f56701f6ee16ee2f4a1fb7a6074e2f31993a1cf3d312f3fb0a985327e0. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/USLD91753723.
Recuperating (feat. Gabe 'Nandez & Fly Anakin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bcb943d3978b5dc403cb078e7acfc5253a2a3e3036bd683dab1e37edb51287. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/USLD91750370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fda7d0b071154da1d075fd2f880d182ca531782622be73bea17cbba262e82e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USLD91753724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8734069e81e9dd6b23f58431bdbdd195e938b75a004fed3512c49971fb65591c. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USLD91753725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9907d774c9a3e4934e238a9949339e49858061ad1c14274980617afe193f2c57. 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/NOBZY1801001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c46436a09b9254183db6bbfd0dfc5b093fd50675bba92ac649ce484e3caad2. 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/NOBZY1901003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9907d774c9a3e4934e238a9949339e49858061ad1c14274980617afe193f2c57. 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/NOBZY1801001.