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 0xc6ee8a69dc0d50256479cf218168d4bf4843d6c75ce440d646dbdba76c12a52d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da87e69f-24b5-491f-8d6f-1fa9d9371cdd.json and https://artists.proofprofile.net/proofs/artist/da87e69f-24b5-491f-8d6f-1fa9d9371cdd.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 0xf39150254d2946c46f02f476d238b481d95c8b012295d9c816580ac2ae52a2ef. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:46:20Z), 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/INN241600283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7315a719ffe89aa2839368dbc032f764a6d364eb6402fffc892b2794670619. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/INN241600285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6f8649d060f4ac6097a49ff83a233bbbb88344370042b68908d3f70a8fc6eb. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:02:12Z), 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/INN241600286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3df5042136bf14dd102493e98f194a9c9072b1bec384c5eea10b7a42ba9a75f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/INN241600290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe9f81705957add4601a876ec6d926ee74303df6c3fef3758cf6ee781d6b8aa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/INN241600294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa21850e955f2640864fbb2dcf611cd16fece341544f02a88488b49480f0ca1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/INN241600295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dacf3984d72bf19bad76932fcb5ec9c197267bc3bfbeb8d73d084f9cca12cd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/INN241600296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ebf39a4fceb3f549c9eb82066a3a85db2ede9285257dabb38861dacfb67317. 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/INN241600297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88981cad459fb24ddb87e2e76390ff24c83f8d305d99ed8be9ac3dd7ec4f9c19. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/INN241600298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96577dff96ac1fcc772a3be65eecd94fbf902db2780f4755d86da19122d239c1. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/INN241600299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d4a90876f999a78e6d1672052af3a718f4f3139e4110f2e9dc0813ed3d7cac. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/INN241600301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed98c795884694d2c90e74bb0874b41051cb8264d17086b9adea1617c28b5c35. 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/INN241200730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7870d2673e007b82d27e53c52ebbfdb61ad77d232ab03b8ab05fc38e2e5b71b0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/INN241200734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf961cca0f90dd2c2c8cb32e4a5582eafc430cba4a3f3887718ef77d3b8bf408f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/INN241200736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd6fac35538c7d3958d275416804d1fed0f705481371d22d601f7848c12e7e4. 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/INN241200737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f4e6bd48ede936463c0b4fb812e72e1b8a1fcba4eb149b9244114c5c0ea80. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/INN241200738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ab713a834f4ad474b04714de91c7ac69643e72f7430ba79fae665c30a31260. 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/INN241200742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c3005c725d1e86f94b947fce39405b3174b3ffff42f9f92c454b9ba5c9b06d. 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/INN241200744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fff3914d0a3085bf22c520c8cc5bdb1d4477852d9296e5c1790ce3ab9b7bfa. 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/INN241500751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e8327259e9cbec841b1ea567953033be6645721da1ce5cd4062a2840b704a8. 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/INN241200748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d442eb98a9e9f6dcfbff5112fbe2b661303c7f10b2f6f56b95247c7275c731. 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/INN241200750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929e7afa759f697281a49b308c780e81a8a0d6d89ed307b812c7d80a9a756ee2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/INN241200731.
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 0xbffc6f9b0e3c0e9b64426d363a5ba895ccfb1814aa54c4aa987dc144b5426029. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/INN240400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999ae778e8c1f4c230a90d26ad801a4c6f6ebdf1bdfec61f8c9c59950f31c434. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/INN241200735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988bd1861c8f2fedb35f86da39370e0d4fea8e484fc529bfad5d48fd11729031. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/INN241200739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5483e8d45358fad861e1dcb30c379ae96d2f90d3c913b00250eae4b5999283ea. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/INN240600437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf130e178b9557b1baae427f71e2b23d68f13b5bfa66bc3045ed163199e02fdb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/INN241200741.