thumb|upright=0.75|A simplified illustration of the graphics pipeline in the Vulkan API. The yellow sections are programmable shader stages which can modify the different data being processed by the p
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 0xc4e433c3ded447b7ea6fc55fb59a74560c07a01303ed071cec5ec8ab6e91bbb0. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f79f7da7-d595-4217-a4b6-cc2a207f4dc8.json and https://artists.proofprofile.net/proofs/artist/f79f7da7-d595-4217-a4b6-cc2a207f4dc8.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 0x204e583f43e1d1a1c4579bb02fd7ca543d569781c4c4bef0a80214560700b781. 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/UKWX82100586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1966007116973de2bd4d005581c5f6504e99f34c8fc83d7620d334a0d96ac071. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UKWX82100588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a808ee5f974b2325bf0699c704814e8ea23361dce5694baea91b4fc7d872528. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/UKWX82100589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32edb7d1a2bf40071b91c1ff13ff2eaf685f8f4868e1c8c586dad63f04008e9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UKWX82100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe42cde9f2c0a9a19a543b369860957c3088ffcc512a0642089caf80b312011. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UKWX82100591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9f21578af0641a9385310d8ec04708cbefdc80d3ec1bb72ac22fa9979a84d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKWX82100592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1911480c8677f3eca6f074d0b9ed2ac92f472cc1486c4e4fe6dbcb2371ed1f77. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/UKWX82100593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5916c72a8da77930ab4e946da39a942a3d4e9ce015af1a9d971bba5e5cacbb1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/UKWX82100594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255e328b857aa309d9f39a1f06395e61429ce3bfbcd51b8bba1a45b6d9d90aac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKWX82100595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4464eac32cea2444ee73dd041e1247246e9c0cfa491e957d56407f2b8ced95d3. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/UKWX82100596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84c9a214112309a71beff1c080e830204b3b0381f1dcacac5c76b9e9ee8ee05. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKWX82100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bb8a97cbe84579b7c202ac60a14a23bf8224ebb0ccde25d414a428c330d4c0. 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/UKN492406837.
(It's Good) To Be Free [XS Manchester Live]
(It's Good) To Be Free - XS Manchester Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f1e638fdf6b75d429d84eb4b212df87a981ebc817260eb8a261531c2a04341. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKN492405956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549a00bd69b75b1db96ad8ae45e93880cb6f654510067d720e04c0b5cb8966fc. 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/UKN492400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549a00bd69b75b1db96ad8ae45e93880cb6f654510067d720e04c0b5cb8966fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKN492400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201dbd4f869fd63939bb16a447c3cb41334b5acae7f424673f0687ad83b5fffc. 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/UKN492400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7112e5e29adf46b518fed05546013c2467e01fe788a56c5966d6cee3ea47124e. 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/UKN492400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88229824d9e619018c624c7fc2e2c96f344a691513fb311ee4620c2f75d8c786. 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/UKN492400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a808ee5f974b2325bf0699c704814e8ea23361dce5694baea91b4fc7d872528. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/UKWX82100589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4028af5cd1c34c994ea7ae2886dcd6f85397b67cf70c883e37ecc0c8018a162. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZMEP2035140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f9e40e67e85cde67c56d57d14647fd3096848c342076aa27db401a5f921659. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKPL2018449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92eaae0ef42eab55f6bed6219560428c79c1baaafb821ceebec44baca60648cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ62089187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ca947eade5c1d3e56917acdb39a6db170e0045ca9b3920132f170fc80c13b6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCAEP2046400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad62a07a74d1a3c10a59b3a13bcd9d598ab69a55959ccac4060afd833e4f4e9. 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/GBKQU2471333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9126ee294f9e8d788a752082cf0c5216013cd9cc727818328d2f139b06e81b9e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU2471334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86a00716bb0829491a4a9e9344564a6d9ed6708462f67b475cca90e1ae11bf4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU2471338.