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 0xbc508ca8748f0150be9be0d6cd8b2f290acf95f633f2f62426630ba4cbf81c3e. 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/6b062ebf-9999-4700-b38e-fc62cb27f89d.json and https://artists.proofprofile.net/proofs/artist/6b062ebf-9999-4700-b38e-fc62cb27f89d.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 0xbec8cb977fa7d6f8efa71d21195f9ac51b868040159e7b2a38d9012e0a6106db. 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/QZTRX2363218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4abeae74c3eba6d0dcda657cc96f0f9090c5d8ae5f59f856a0a50320898c16d. 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/QZTRX2363159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7124be1ff8ac1b28e6106589d28a14de5a6d3ce1e6cc360a1fd067b0d7529b. 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/QZ5FN2217649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514ff1c2a8e7658c51c1b474ced6e1ad360dbb551694b2e87199589e066db76c. 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/QZGWX2096870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ae9b2c3b3ea8d38f589c9178f2a2d76ab9e1e42fea8c04f63a71f89963d731. 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/QZ5FN2217686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cff5fc0c36affe90de837e6797aa1aebef75117e8326167fe84317ea3e7d5a8. 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/QZ5FN2217696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c9c51c1c1330f510be24674b7f82167ee09547492f15236e809579fff9968f. 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/QZ5FN2217693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753298373e85f69e22727bbaf55b16ee1ea7cb784b2b5d02e28073ee63b16cc7. 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/QZ5FN2217692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b856e5b31e078343f17c2a5c1ad5d2354bbe4574b0e43b7741507c01ac0841. 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/QZ5FN2217700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e0da9e95fcbdd48f41eefeff1653e4f033df5b7b94c465070be19be3863d5e. 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/GBSMU9780703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f61538ee2fc76a6db56771942fd750aea0b07e710db4cde1c503114cfeda6b. 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/GX38U2143096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad415bd993dca4fbd4081fb581c6692f5d26c16e1955ae6c56997dcfb6fd7603. 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/USLZJ2466710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffbf80c0302236d4b5aebe0568510f00757995aadde8eb468b8264048283961. 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/USLZJ2466718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d92a869575c2b4132c72c2856107dc465404358262304aa37e358121b362ec. 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/USLZJ2466720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a254e2c5e0d2ffa6e43948d3e23f1a380b4c29b7f0d2cd189ec54833d6c5844. 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/DGA082481853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514ff1c2a8e7658c51c1b474ced6e1ad360dbb551694b2e87199589e066db76c. 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/QZGWX2096870.