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 0x534ac2cac198131a3d7b8dfe2aef1e581c5482c3b8c7b8428410b209353a0cb0. 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/db35b814-bb40-4df5-90fc-464cee0ac0fc.json and https://artists.proofprofile.net/proofs/artist/db35b814-bb40-4df5-90fc-464cee0ac0fc.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 0x6c6b7e31e0ca27655710f49aeeeaca1f118e393925e6ed0af5a3e0d822d0e9df. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GX3Q92083173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618ec7c17f63597a1da9e7e1341b5ce14d98b87f9dfef61f6206593dd49b1cd8. 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/GX3Q92109397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a0d38de4778cff96ea103d9a938f5893aa2b645ff61cec1cb7ff8875136d62. 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/GX3Q92083162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97bb6998ca0efdea41874375b44518be133485a9295ca1121e499f76f597b7d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX3Q92083150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff8049a2d81bc40514bb33e1cbbea07b6924805d706b3822f2bf8778cfe6e86. 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/GX3Q92083156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53473a9ada6bb8f46791de4b48cadeccf5c4f781b3046f17c79ba4b5ad637b23. 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/GX3Q92083152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41162803be2247bf43c253d8901006084e77a26b01e13d3394ecc28b7589f613. 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/GBLFP1900293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48399cde22487a62dc12cf5c6bbd102640ff040057aff0fa592a60718a68c4e. 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/GBLFP1900294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cb758ece76856f7a72619de4ecf229b7570e1be8ec599e42c9b8ac5174bce0. 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/GBLFP1900296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25d350265227d40fe3f69dbb13bd6612c73d1770dcc527dfea34150163a0d05. 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/GBLFP1900297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4f62478417029730173a42a419fe6b369ba952828a0e0585f22c333256587d. 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/GBLFP1900300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff7c08ec5c5881472c7f4a530aac618aa439c324a0c01ea224cc7c8f15f2a1d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:51Z), 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/GBLFP1900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd941809cc54d1d94a4b733346621e2db613f170c9a676c6eb293b5f3c1a5eb12. 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/GBLFP1900298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ffcab1b9e365564208a040e7fb0c41e3c98b6933cd95e9dcffd89421da0ba3. 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/GBMA21886381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ce81b62e26fe416d2a7b3be73ce19947c2ddb855d41061bac79be2b979fff6. 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/GBMA21886385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb716f88b06ac959e11ca35b08a65cf0d2d5921f5dc7a3ca391b11837bc675ec9. 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/GBMA21886387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed92c3464d13f05bccda4c51e0799267603f5624e432e8f7975bbe1158c96752. 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/GBMA21886388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3182f6d78b0c697b307524303400b8e3e9b0487e747eae2877042f8260adedf8. 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/GBMA21886389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d89c8fd792065ee1aae2231eb7592c64e1bf073ecc2d3de246e830771d6fd7. 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/GBMA21886403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618ec7c17f63597a1da9e7e1341b5ce14d98b87f9dfef61f6206593dd49b1cd8. 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/GX3Q92109397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7b8684bfee7d71d918ec75a6832e0aace6cc9c7e0b3c00ec501d3fb705bdf9. 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/UKXN22016134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab4b5a1b57a2d4b37e6e3bb401d01816b7ddebe477addf9be44045af99ef6c6. 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/GBLFP2062903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed7594a2e80e61c8f7b80152d815f9e60342bcd33100f1eb935ffefc0b43a78. 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/GBLFP2019619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefecbbef6568b3efe969bb4ee0bd1ca1e21295a27b6bbb5995099973dc09a4c5. 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/GBLFP1990423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b3085660e99a1ca81a29a439c204d3cdcde382da4bda2fb617d1f26f470ab9. 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/GBLFP1952910.