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 0x0965f6d00731d22bbc64eee7e2249cb991af5075ce6c89179380f6b8bfda4106. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65cbed91-7f78-47e7-a6ae-807a33b270ce.json and https://artists.proofprofile.net/proofs/artist/65cbed91-7f78-47e7-a6ae-807a33b270ce.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 0x5bee4d7643a65eadbf115fc4682cb2b3d675fd213bf8e29c97dca5caaf4b1ebb. 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/GBSMU0115173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9af06ba7fd57c9f0e235e03a77b78469d45a0baea41706e283ea197658f3e1d. 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/GBSMU0115174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8689ab1165129a74711399759caac26ba0596074ed0303079ac40a46ee9cabfc. 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/GBSMU0115175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0a9ad94c3daa58a2f5e3861cccfe8aabc6e390cd4eac037ad949e9b90643cb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBSMU0115177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8844b948a4cfadf2814185d27b427886693fc66e5669f221aaea950869f69e37. 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/GBSMU0115179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb46214368b85525a5576bdaab8b0337c0e08ed6ea9acdf5a91d68339b3f4919. 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/GBSMU0115180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26770534937571a6ac6fcc5f99519782f4c4d6445a8a185809db065a2dcbaf61. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU0115176.
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 0xe381db8c7e2a878aaa440dd6bf8fbd8b6e9703a6b378854b6e963c8772d7eb1d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBSMU0115178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49166c2d2585810a168e5c14d8b823cad177b359f54b0e1dcdbcf6c4b79135b8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBSMU0115181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7ff474bf7c058882b14d4aff330fc1f5451916a33424e316cf4cd0cd1dc426. 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/GX5MX2285916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe257dc1ee953867a3c67db1f5080a8a9bad852ff5394df92e5f7e5514e4bc2a4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GX5MX2285926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e77fd0a1703e5f5eaf4ca3e565cd99600ef5e6f93675586ef9250f729e2f67f. 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/GX5MX2285928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508aefc7f740a87d3d6cee4f37ca50bfef8fc9d0e68c9a42eb7d7b91b123deb7. 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/GX5MX2285930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0245e72725edb0bdaba328ba50edd4ccc8218035c7bc62744da7f6dfdeb49dbd. 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/GX5MX2285934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5b66e12f813546c4c6f546ae707a637adda850b33cf3bb2baf2b43a868f3a4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GX5MX2285921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa871d38ad0a08acb394dac0b0f95f9ddd09c4c8c988aa24f499898196be886f5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GX5MX2285932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ee06ea534643dbb2cdcf157e8167f3c39eb660928d587fe0858ce93c02737e. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GX5MX2285935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7422b4167e07c2cdf37fbf90f8fb098e4dbb9c43420a25cc08a61df75cb39408. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX5MX2223997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba65ccd273d15873f7fdfc0c11d53c3ab5dce0b0cb6e41143d996ce49a7fa05. 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/GX5MX2223998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7497c9c917cc7e00f181a26df20adc0a258c3073fe88d5048c5b924a76b5ded0. 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/GX5MX2224001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091afe0357cf4e912ebd10206ebdbd3c77d029ec23ad088184344aea62a7bb77. 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/GX5MX2224002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ce936479527557ac309bffb6dc9df47e6c6b4f74537e6cd6b7bafb0f51f4d2. 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/GX5MX2224006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2673344075169b659c00c234a870c0facc44b3f03bd6a8f0313ed09c81ef304. 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/GX5MX2224011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd603235f259183db3e97e516fb5d42907419c42ca3050029602f828dd828c3. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GX5MX2224000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64a4be0c28a0faa8261c2e25d492ec23534945bc59cbcd5487c636ca83defc9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX5MX2223999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc077a55f0816841b8eea4127457fabea319985a31bc3fffcc336e779fe82c4b1. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GX5MX2224003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48ed59e7b67f6a34a11794ea69c192cfddd04160c889cdfb1c83bbbf873b928. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GX5MX2224004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eadacc4f055ef75a30ce7eddd899c42f9818b92769a2987563549c013759ab. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GX5MX2224005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e15845c9c51fd85aa0cc6db8b05d297e5eace5244b099eaee95e18806e56dde. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GX5MX2224007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9720ba3dba8a13964b364eaa58387425d25d220489d5f76ee06886975597492. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GX5MX2224008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cf22470cd37c167ff2ebc4673837e58b2b5a76e7c42c4e1186c3aa50da8e10. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GX5MX2224009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9002a52bc59cad68ec0a16471a840aeeb0d3f949d9a23640b9b2963951f024d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX5MX2224010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9b0f41eac9a99301c6d347559c7199387fc3c0e12783b0a333cf7ff5897425. 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/SEYOK1864463.