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 0xb59636ae22eb16022b05bf85225c7f6cc1aa2df6bcf21dde273d8d50da4a0ab5. 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/c2466a88-f938-4078-af9e-08ae896fbf78.json and https://artists.proofprofile.net/proofs/artist/c2466a88-f938-4078-af9e-08ae896fbf78.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 0x3d4d31136590602e7b6c10fa5bb9c68f4ae0188924870d83011d5555104486f3. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/FR9W11930615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5ecccd26c77c4c9a6f84f8eeba44f7df238d9f24846143e5545e9fb43456ab. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR9W12008505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf763d2a305f644ec67b03d365ae8c39ad4314a74f38a6b8c78fa7c592c036a02. 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/FR9W12008506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d831db7eb87ad8a5bbfe085ff6b31a64e0f2bf49f76072446b34de11c2970e5. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/FR9W12008507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfd935ef111009513a8abf37ade3b8c407cf55bf00f734917b1d24733958202. 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/FR9W12226427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705250cdd02d25a5c0916b4fafad2029d0b8f909d334b72297e7eb33b2ed047d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12347288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd47b4f2cfae2759cce06c62511f8ccebb2e6e7bf154a2d82635b6217aa781dd. 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/FR9W12352243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ab629613454fb2cc91d145763299dc1034736d5f8a3a10765eb7b8b6f5f073. 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/FR9W12352241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bb875af7ba3ae65fe962dcaff87597fa1c3df6a78d3933790c3734c62973ee. 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/FR9W12352236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c10d396d773ab5e9a7b6f764034859e26067ddb004ac5e2bbe1987eb99e61b5. 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/FR9W12352238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfd935ef111009513a8abf37ade3b8c407cf55bf00f734917b1d24733958202. 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/FR9W12226427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5392a5ea7e6a0c15c0ba5939c1499dd7bdd3edbe875b318b7ce42303cdd98d91. 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/FR9W12352237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4a3ca952b4660bd9e5f75d65a381c744a465c5f1b76a3603a5b3a1d5646b18. 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/FR9W12352239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705250cdd02d25a5c0916b4fafad2029d0b8f909d334b72297e7eb33b2ed047d. 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/FR9W12347288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acc7ab7246f61901017a1ba13b31e19a710fec1458afc94b4d37161eed489c4. 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/FR9W12352240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517ebbd9838afe6c94c2c9761d9a43b3e660c90b87f8b32ad3ca18e34b796f37. 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/FR9W12352242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7085752ac5060b5347b1abb3cf8c347b4ac16342c036b55ad265058053acc006. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR9W12433414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b67a10a0d160c3483d7f1544c95252cefc7aafb6a665ab2fd42a96e28ce875c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR9W12433415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7f712fb52782cad9f26b78cf4d356d533d3aad641c886133c89b9aa830f944. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR9W12433416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba8d0175be17b09a435333cbfb7d4d46aefffdeb94cf4c34459491f9c6daf1e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR9W12433417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce48167a2d9fae89984ffe110379930883f8a13cc2c98296c2ee7f072851a39. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR9W12433418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc438bab9a78ccc3ae4fcd9df014e5c981a15f4e1d602d4dd22949c50e96e5b3e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRIDO2416365.