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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a5dd791c2ed25cee67eee2c805984ecdf809e732f1748dfa9237515ab30925. 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/e9584f6e-215f-489e-937e-7909afd43aea.json and https://artists.proofprofile.net/proofs/artist/e9584f6e-215f-489e-937e-7909afd43aea.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ce79c7186428d656ab21caefd0bed665ac3d21c958f0646063537d2b0384d2. 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/USCGH2476414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da331d2c584027ad110630075d9eebf34fe7a4ce249f8740a6bec01da057f77. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USMH92383075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7948506b84dbddf74e97f26bb9a9262051b36fee44dfa75dca1ac18d81e46775. 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/USCGJ2388351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a9937ee7c4329281c0d3c2cb86177179b805920e5373a5010b0ffe4d084c42. 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/USL4Q2296849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e38258eda85bdd8cb6a90f9900d20dbf40da58c0f4f01a720c1aa0efa256aaf. 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/USHM82212015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d97765dcbc38080c4b813c183127977f6ba08f81285ae33b8cee75013926336. 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/USCGJ2207578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465bd2b7408dce2107c2f28ca34c647ac0a004f36352ef759739f8842fb7e7a0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM92140358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d381283c5aefb8691be505f5411addb0a1f9f3084e838cdce2f022523e7415f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USDY42103780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ce6ad2f35639b0b324a9502180700e0cdc2aa864a23aa3d48dfa7d20fa0f96. 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/USCGJ2130944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e674f3113d9a1bc1e903b6e0f3b95cd87410f1ffeb038d65b25c8f2c14d5fb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USX9P2057568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e8ad089b4545aa8c6e16f528f52eb639ef3fb799deeabae3f565ff518fd817. 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/USL4Q2064399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6772078747784efbc7146af3ecee8f7c27ffc502add4539393ea9b4fdcabd67. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USCGJ2074522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cda4e1f8d7f4619a7ded260ec3100763a848b2a8730db54fe2d5afb140fc27. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGJ2074525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abca388b40b77a59c4be591384526292684003f811aeab4752db13a62d5efbb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USCGJ2074520.
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 0x2b1536b06f05332cc73dd8901beb8c5f51b535fd097e07775220908cb74aa15e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USCGJ2074521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af4251b93e524c60f27bb9525a9fbb207a73bf15aac0340ee25787e5ef51e47. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCGJ2074523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc343bb70ab9c2bd1b41355fcccffbff907db1950dd1051e18f526194ba438029. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USCGJ2074524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91a2af3904f59c8180d30a968fb45a90582b4888d45ccaebe99cd149f439203. 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/USHM91996765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0d6af25f5232b1b1942fcd02b2de84c7ae3bc21f39f0dca0bdf58365a86e9e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM91955898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b85d4dcc1b4223b827e3ba1cf6a3ff36c0ffcb6343e5cdb67bb9f71577e442. 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/USHM91908181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91aaebe45db894646527a7ae23b154475fbf498397726a4094b976bed34f551. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:59Z), 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/USHM21989683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f52565654d7bc48d3ca9f99815ed5b9b6ce4508a75cf70066cb5be2014663f. 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/GBKPL1935833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6946ef9b29aecf9942876695fe66486519922da9df7c9bd8fc675278e9e6329. 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/USL4Q1800166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233e49f935c2cb671e6258e1c18d094e184b20b34985514daab54c65a2ca89c0. 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/USCGJ1837145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638099441f7b84051c94ada3930980c4d88065cf75bc9a366a0f2a8403b63dc3. 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/USCGJ1807423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804206c3d3c69112d18b51570e4c973c7bb1b3f0a4fa4747b9f9aa8fc076d53e. 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/USHM81774792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b3278b971b76bf19ecf1bd83328ce963ad89ef858305d1199f61c4c500b340. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81778304.