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 0xa07b4647e1f23ce1f2774551ed63c592cbf01f98d032daaa47fd401a795d991b. 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/1db9f602-4ae3-4c08-8fc6-566d3b2b55ca.json and https://artists.proofprofile.net/proofs/artist/1db9f602-4ae3-4c08-8fc6-566d3b2b55ca.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 0x44fe4cf42749780b6b9708e12c04137b48df0208dee13bfca3c6f52c25e34bca. 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/US39N2304805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14184b361c84a39d3379ccc1770fb0c22549affa05467e730d1db827f71bd03. 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/GB8KE2403041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbe62ed9089fcc34d7d5692b314fdac2f05fec973c76eb7c5a8f6e652039f4b. 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/GB8KE2203214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e2f5d52a33a0652acda643445791d5c0688113f7c0d271fc6ca8cfadd49f3. 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/GB8KE1554729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40658f73dae9ffeae676daccc82c1fde80525fa146b3a34bac07881a7499176. 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/GX3Q92097747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc4824c57da3242a24c14f0ec9aea3e6ef6a8dd115f5c2cdcf2859306be6a68. 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/GBMA21861885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0dbbcca8cc7854b45d8248eac7c2260df5ac5ee99a9fda475974a4f5ce6263. 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/GB8KE2206992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa67c18a2ccc14a7f98786099f542c6759c6e36fe4972cf53ad9f8677ca9d8c0. 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/GB8KE2211544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d2a32cd53fa535d00bdbbcbeb18e9172bc0f14031cd01331d6a6a47cbe85e1. 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/GB8KE1858918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b8327b58a6165e8747f02d9092c38fe9d50a5001e75b189e2c8c8e1f14d38e. 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/GB8KE1557875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc388ddbb131fe275c0554f3282d103f7ab230a9dfe4caa880d64d2209130b117. 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/GB8KE1557883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcfba782aa41c996d02a0e04cab85e82c8457dbb0cdc24ff53ee2a4ab28c8b4. 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/GB8KE2329117.
Say Nothing (Nu Elementz Remix) / Turn Up The Bass (VIP)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a5a088a625c30b341e154efb13c36017d3101bb0f95d6ad06f2247915fd7a7. 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/GB8KE1758624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813651aee9a2e31e736aa974580d6b8f9c154eb0445b1a844cbb6ae81b41556d. 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/GB8KE1552222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fe4cf42749780b6b9708e12c04137b48df0208dee13bfca3c6f52c25e34bca. 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/US39N2304805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07871754e1745161d4f98256db1b9d8ebeb46e9b90cf6a6e3fa68f6e1c812545. 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/GB8KE1857155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7d8745ff160d7443efec6edb73b0823397d7ce66e5d3945d7ef3549583f461. 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/GB8KE1857160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8226a3e11cc698971c823ffcaca7f5a3d613f8627116e66ed3296ad31221beab. 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/GBLFP2041279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaf2ff3d1177c3da5c9d7bba880c13b9535fb975006ff75cebce1eafe461e6c. 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/GBLFP2041278.