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 0x4221580c1e1aa9bc1cb0c06bc596f902f96b0568bc9f1fe5f812ac71f0300e63. 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/46864f99-5f18-4c16-a77b-a3ba458f8b46.json and https://artists.proofprofile.net/proofs/artist/46864f99-5f18-4c16-a77b-a3ba458f8b46.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 0x8949e19b8b7731d979163e600ec18733db33444663bc88b77d7ef0965c48cc66. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/AUGBT2411986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26db463178d312cc4007989d0330fba6811cf8ba76998174af0d22b371de44fc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUGBT2412465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1814f93d2c14602c86a99c613b6cd42f83c244550b9991f3ef95bb02dd8dff. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUGBT2409135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0f2908e4bd90d3d1d2c0714a2ea75a992dfd9c746ce8656d1b7e4f1687972a. 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/AUGBT2412462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe975e062dd7c6c1be7a4c3c97036390327928a1917af506dd5346a28b9cd67ca. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/AUGBT2410283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256559adf74e733684e6238fb059fc79000006c78ad6b71d68338147aa281ae5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUGBT2412494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1015b4b48f9b9745c87dc5a6e2e940a07272545270e60429f0ca2bca2bae12. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUGBT2410229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49660fc08ce68a14593790a72680eb3c05598398578390c5d739de9300ab4dfe. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/AUGBT2409153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4416e126f9003093201400690b7436e1e3f60dabf83111b04aba4586fb8a3de4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/AUGBT2410277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce6e8cd8e356d49078b84d3d381f197cc1750abc167ad4c245f2cbfcfc5b783. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/AUGBT2412453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da3a7ba190322273890c7a999a7f6a8553d8e4b588fa80f98a5abfcaa68ed8b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/AUGBT2410291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fa056bb610a15a7b6106897b890e258ef27e81bfd964975d179654eff26633. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUGBT2411537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd48778737a17f2bfd49ebd399d7f1b4ee852fc84a8f72ef4f50b42419c168d. 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/AUGBT2410224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85681c1553cc0fcdf0d1e98b8cfed66d336456df4608e1f59b7b3d3d7d8bb34d. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/AUGBT2412481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd2f2f3e08d25496ce220ea231cce947fa7444814979da5f09bb0a55d93893c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUGBT2409089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed59767010200cd88dd430a783646f50cd4028ff58d673b2418e75da2a7c729b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/AUGBT2411488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b35de932cd409ba44716e81616e0fd4f6f56df6181de8fc938a58e83639003. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/AUGBT2412433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9249640d19b0576b7ec794dd9b74ef7fafe71cfa50ad92d165467064d0f9fa93. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/AUGBT2409150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cb10b17ba21ee81062b6fcb9e8e32757ced67dbb18acd7eba6475e4c785ef1. 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/AUGBT2410236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb8c77851e481ead990da4f8b3eccb22ee6493c3bacfaa5aee1aa6424316c67. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/AUGBT2410230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fa1f741abfb2adcda4b10097801f77cf955baa0c8d5be949b5ec29f80c2e75. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUGBT2411515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bf7d84d05bbf57163db943e0ccee042f9c50869069058064e865f0b4f971c2. 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/AUGBT2411492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e6f37e884a063e197a18827787bf2e32d6094732553b392080b8c6a912872. 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/AUGBT2410286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2a9db84caef8d7043a236f3d161d91b800b834fdcc6db271c0268dd56974e4. 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/AUGBT2411962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe909165dbfb6a5e4ec2a6486431cb9baea2756b874ec92e5850a81617a5651f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUGBT2409059.