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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 0x09dddfc2619e476e1107ec6f8b1b432f2dfb4473a52453c6c263a22d6eecc5d7. 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/134f628f-dbf1-41a6-92cf-e3426385993e.json and https://artists.proofprofile.net/proofs/artist/134f628f-dbf1-41a6-92cf-e3426385993e.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 0xe150d71c1fe1c081c435cbe1999d2644a9c08e6ce89ec19a5d0405af7ba56dd7. 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/GBCEL0400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af91d4c3035bb9202bae45c912e4a7718ff19fdd97eb7360c58fdd36dd8acc4. 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/FR96X1987567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd2cd81a0a630fad50ae58c70446cc714f451ea83eebe6dda562c3946eb3607. 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/FR96X1987575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395a607f2d4a56b4178935bb411b7b97004ecca658eeb9e39c2e20b3338bc98d. 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/FR96X1987579.
They Removed All Trace That Anything Had Ever Happened Here
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4415b30191b4d0e84f66149abadb995b77e18aa049b11be6d4220ac5777dd8. 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/GBCEL0100430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afce12fdae51b62ea19db9d68c1d5cb1fe6efb9ace287e600542247091eb59f. 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/GBCEL0100431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a32474fd985fc8f0bd63d42861312cbcc77cd6bb7b905104541775861b4144c. 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/GBCEL0100432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2647f97b2b1b70e43e7cc16aedc4d9e59063dc1c3022e1eca1b92a6f897f884a. 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/GBCEL0100433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449bf9b1f2e49f81dd71da828a247850296dc7803237ac1f4cb728d5173ce150. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBCEL0100437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1e28ac23071fd1553f91dc2d14cd2751e72efe075d564e995e55f654a4fba8. 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/GBCEL0100439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56121d5bfb35162e9e6602bc74273ec025d69bc36d998411292abf1f318e8f29. 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/GBCEL9900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc3e97e7207131b81497b0352c6eb14e17a1a04b1fdb7d2fb861c8e02ff0724. 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/GBCEL9900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2ab390b0bb4c5e051fc39e7eb02f51a94da20db3504cf78252f16f791453ab. 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/GBCEL9900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd7a3de2ccfadb7cf52cebec0fed9ec5a84377ee448aafc8faab1d7ad21fafa. 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/GBCEL9900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047a20f8d0228eec5e45d63bdb2d55e2c7e3f01958821329d0372fe6115158cc. 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/GBCEL9900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca2a4ae9ae7f91b9aa04b748ecf98ec3ccbd3cbd52ab0ab2c560fa4ef5e51d3. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:37Z), 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/GBCEL0500500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd097208934e9f4ade97ec48594f72010ec392667c0e217665ea7661ffac74788. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBCEL0500502.