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 0x1f7ff31f5c3b456172a94f2314f5f2f3966b88e8682f2bd8359e1fe823d613f9. 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/514a9129-f40d-4606-aa16-4683aaa73d30.json and https://artists.proofprofile.net/proofs/artist/514a9129-f40d-4606-aa16-4683aaa73d30.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 0x6b7d31114ee1d6332724794a4df7661d8e8cf3ae80ac21fdb6f6a06a3b868dbc. 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/TCAHT2334358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604bdec93cc5f05299431631af381c6248400e4a7c0afddf670c9897c2278c70. 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/FRX452040967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b9a7b67778d4d8b6e9d838e400ad70f3d42aef35b6094485359c26288888d7. 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/FRX452040969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8dafc5872055d696e9cfaeb68e8810a35aacf3b5f4158f7a16e156c2b6c63c. 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/DEUD42563816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cd5c76e690e261f579c393f51daf78716903d1b4a0091141ecdd6c6be10e60. 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/NLHR52241710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4427fccf2c43430f3fca4c4386c116f8dc012e0aab709e642c596b692c99411c. 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/QM6P42588730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bf0e8beb1b072b3ec74f6d17e1673d0be4af882d9b0e2d73856e3f0b68f202. 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/DEUD42552140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f17799b791026f8d89c6feb1281261b9157c6635e17a31669c3444d831039c. 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/DEUD42552142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e286674339891e4ac1fe8e9fa6db355eb3dd726738f894e1492259060776201. 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/NLHR52201473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea1fabb445b0271c8fe98792d6444175a273a579f458b7bed3ba8576fb4c5d5. 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/TRBPU2500155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d2f0f317312a2ffd45be5dd694754f0451f7c62fc88d473fe0204c8db3ecd6. 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/NLHR52186363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12fdd0ab1b531a5abaf516bad7b8591a15c3b06851a58e55e348467dca77a8f. 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/GX7852401467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6dcca7accc4ff6e62ed6c5d5181ac549991c6de3df671b36a419d8f139e8cf. 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/DGA0S2435885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395f6548a36cb96168fa6238fcc570e6c8feafb926e204ef55dd5186ed66f6ac. 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/DGA0S2406375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9631ca961c9b18fde9341e413f99c24f58967caa59e205e635306c64891499e2. 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/DEUD42441855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0124eadae1fde4a6b442b62fae90e77b0e8f657a833903fc4aa59be7e1feb578. 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/DEUD42441856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb027d9e12550a95f0afa3edea18f2f437bacb81d2e7e0f8200f3104729024. 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/DGA0L2428113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b7417e674cd872fab0eec070d3fc70a034b700fced87e368eb9e88e5572e5a. 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/QZAKB2417553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8342c4cc49d1344c4b3ca8fb8b675c932702705bdc62924f0b39b1a266a918d6. 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/NLHR52166842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78d986aaeaaa26769f03cb24502e53c957ca0afd338859bdbf80dcd380779fa. 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/QM4TX2485362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5acfeec6f25b2868657e35dbc27464f735ede49d437aaaf9aa42b456ae6d71. 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/QM4TX2436370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13547366b12e9a80f74904800470089e8536f5adfab5dfc05fb94f3dc1af89fa. 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/QM4TX2419781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa95b22047442a31645ffc3acffe9a171efbacca6bb95035c90e2bb1a6ac4d3. 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/TCAHX2458881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffc1bc299ad813fb2914be83338f618cd8f79ec748cb62e0241a4bd75396d0a. 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/GX7852200857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761b46c4fe3b8a9c5b768b1c5a8e065d84657c83399b81cbd4661c96979af973. 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/SE5BU1917871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0081686af316d727f717ddb5cc841912a05da0b57c890082b6ef7b67deb963. 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/DETO42453287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfba57df6d997906dc882a93b580e335ca778d5296c7a94a10a0f6553121a8cf. 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/ALA082502498.