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 0xaa9a6f187409b53f5966b63d1205fc795c1021a8efc083ed6789f429820722ed. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b26a76c2-05df-45ce-8f63-be9ad4951c81.json and https://artists.proofprofile.net/proofs/artist/b26a76c2-05df-45ce-8f63-be9ad4951c81.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 0xa3c5b536858d20fc062035d880a34cc522337ed7f1aee2164894c4f7e2e438aa. 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/GBMA21865688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fb143316d9fba79018deb7885519db2c238521887569503c42fb1d2d767caf. 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/GBMA21867143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e215446fc08a1ecba17ba06086d86d8069ce742aa5184696251288bae0c4ba1. 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/GBMA21867151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f01fa7657c65254d3982fa13e82547a53e3f99c01ec4085d0292d2c18341a3. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GX3Q92096278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2b919233e2716df98ac695e16f670c9a3f7b00ddce576c5a6c7c0716ca82d3. 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/GX3Q92096279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc525515ea11f5f9579c50832cf139d3ddcfb7639eea9a30fd9a152e4a0c6279b. 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/GX3Q92096280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e9ae56d13196e9756341eebc865bf0b46f63e1153abfc75871a304cde7945c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GX3Q92096285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87482cc6960b5b92cfca2090f793b4b86bf911ba3a7a1ce359515e55765f8338. 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/GX3Q92096260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25ade5a5e9d40506c654a7039b39d7fbf3155efc1d71fd689860f6f7d9a908e. 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/GX3Q92096261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f56d3d6df5ad558442a75d0cef646d100b4f491473cecc446733f86940b2f1. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GX3Q92096262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa018494a9b6022dad5577c31b3e234a22f760570fefb3a8be6dbeefb8099327c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX3Q92096263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98fc97b47e6c6f1d02da31a6e3d64cabd19d88d238f82c9749d6da00ee6e034. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GX3Q92096266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b98749711737f76f5ebe68fb85f9e438bb1190c60039d1991e2dd9d263b245. 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/QZ7R41950950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219bd0ada4ba09954ec43f3967d321183079d37f9c28b8431ed94c42c2e94a4f. 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/FR2X41851510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e445cf3b5e2bd6f789ffb2822b1c351746a426b2ae4232ebc6bc0ac0e5f126. 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/GBMA21865686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aed030ea38f0f88b42b54d835855b9628566dfd5af6dbbbbe60be877470a694. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBMA21865687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c5b536858d20fc062035d880a34cc522337ed7f1aee2164894c4f7e2e438aa. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBMA21865688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabbf29ae78ec530dc8429e76b355b72df7acaa987b5fbbe77249c36d27393d8. 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/GBMA21865690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ad4be7bf559557abbd76679225a5158f59aed1274e23f11697c42b804d8adb. 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/GBMA21865697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6270c307a9a4937e3bb446e50d8775f421ae080abe305211523c057a6696a9. 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/GBMA21865702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20884ff8353df249489144326a7ed2dfbd63da337be87f2c681360b5c27c0433. 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/GBMA21865769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f8af47e8dc366c8f29e0dcc39049f2bf1f2284966c9fa34dd3a3e4115cce66. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBMA21865770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1161148de62423547fe5f5766ae1279097a91e1c7fbf7f88281d4860c6179c01. 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/GBMA21865772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2550b5d68ea0b82c751baa1b79f84dc865df49a85cfa97c1abfafe549f2a289e. 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/GBMA21865773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03de7f70acbf95b59991d1e1bd51fd1cae896ad6fadf0b319a30755d7c4c5564. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBMA21865775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87482cc6960b5b92cfca2090f793b4b86bf911ba3a7a1ce359515e55765f8338. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GX3Q92096260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25ade5a5e9d40506c654a7039b39d7fbf3155efc1d71fd689860f6f7d9a908e. 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/GX3Q92096261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f56d3d6df5ad558442a75d0cef646d100b4f491473cecc446733f86940b2f1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GX3Q92096262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6f5c05aaaeeed486e89e22c6d915999fba7f7e7802b6ed19c9af89011d8d20. 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/GX3Q92096264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b86a48556c7d59aed7009cc8bcd3c3ac3cae3ad5c5eb7e567917b7355f059c1. 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/GX3Q92096265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98fc97b47e6c6f1d02da31a6e3d64cabd19d88d238f82c9749d6da00ee6e034. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GX3Q92096266.