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 0x9318d09352f82f838e4b26af14bb3ff0d462a1fe086100fe53d06b89ab0c5419. 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/6475b36b-5a06-4dc2-9a01-b2e750c624bc.json and https://artists.proofprofile.net/proofs/artist/6475b36b-5a06-4dc2-9a01-b2e750c624bc.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 0x9e6e39c3d4ea2fc628457fcc551e390562da68529c57ae73737c3c8c0806de2b. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZES81864910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd74bc181225323c5ae0b8f189be875ed5bfed800ea69d696d4e3ac661e8947. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYZ1969246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca3623362e750e31c9600661a088adba4ea309bc0359d275d1af9b00b5c330b. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:56:12Z), 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/SE5752075151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef0a4baa50266e555571b0971b7f40ce6760767f2beed935299c9592df90f35. 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/SE5752075153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5886661aa79d8d7c08c6deb4a1e02ecf5acc4a8703feef5aff89bf52b679b61. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:23:08Z), 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/QZHN71921189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4163aeed3a5c0d48bf64ad2dbed38e83467783af9852f84560940a049742efff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5752075154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8797760a73376affcfbe3e2ae23292b34543865efbcb292e01c968150d4943. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:34Z), 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/SE5752075159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d55c9229e9d6dc4e2c4c72aca03face8aec87d1c726c7b9621004eb245b3536. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:38:43Z), 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/SE5752075161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7aef0684cc9c923c55ab8b1030eeb9f2ef7b864fcb0ee8d60e1fcd884a887f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6XW2109516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a14ae6c2a6ca4f939ba0570ec834389acd96b41d5e4645fdf1a898493258de5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE6XW2109518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a40d603c7c58c2cc2bd04bebfed6793f0670c7ca1597f170f50d4c311760b9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE6XW2109519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0e0acc2a1cdfd6e7e955f200a2b9d7945ebf707ef2ed7cd4ebd100deb30fff. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE6XW2109520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d8ef07a0d026fab27df19bd51ee0e8a27e97ba67d97c48834754c1244e3903. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE5752302866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767a07aa1075b0ea15bbef3266b7ddb906b9fa371e5830192e3532f98d3481d0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE5752302867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b450a0d4d40751fa5669890f43d0544400d462a7c5ae6e185f73db72da9b22f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:30:12Z), 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/SE5752302868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ef213f8e3ee511e2ceea4ab5e115f344d001875c033b1b7bf2a42e3c1d420e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:39:54Z), 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/SE5752302869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66100ceaed0032740bf63a4d7a141e3aa7e7400dc9579df9fe59557f8c2998f4. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SE5752302872.