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 0xa1f5980d97191bc5a337d094c5b2a234dbdc937e998b73f94e9cacd4d2e732ba. 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/6084fbfd-1ca0-4290-817d-315ad4716309.json and https://artists.proofprofile.net/proofs/artist/6084fbfd-1ca0-4290-817d-315ad4716309.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 0x5ab4e0b692090560d79be784c72cc755345bbecd107e68a67dddd37afa5a6f0a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USQY51610557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b760ae066c2912c6671d21c151e2a0f8ffc71bba86341098e3b86a0710f4f50. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USQY51610556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d8329af43b1370a998844364828000f0a1af75ff4262013eca361cd7bb4a08. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUBEC1701630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb549f2b8b611aa208dd8caf76edd611aef47ae7772b337859290f85bcd6c9860. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/AUBEC1709719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19993e8eb8f3e64d312f255973bd8e17212836fc46fc28a24c7aa9f44b83c03. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUBEC1712954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4da26467db5d088ebb851a077c683f48d80125e710dbeb03dd5696bb2b255b. 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/AUBEC1713121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c42ee34677cc1dcfb1a641d8c67a1bc12150274a24cdce8a2111922bc3412a. 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/GBKPL1808225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5287e70a7a9418d8d78ea93255fc0f899b0b7885dfd9053e111b35dce312ef. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBKPL1812768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe70d5d20e683f98a1386369885142e538fba4d76daf1625686b25b2c6ee3f3c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBKPL1826883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4a5b10206ecdae0630b1166b42f46f1a41e81d94f7179930ac0d61b28304d9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USUYG1266575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb4f53e10c749650c2f7cb3b080b3aef01cc75c30a4632f2b9c888c7532e728. 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/USUYG1273852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d9045f2cac0c0492b05f0fda9fe11eb126aed20cc5b1f2bb186b4a83bb62ec. 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/USUYG1271513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da57673db98c72298019c38bf222e4b0609f1b43c53305c69b711379a285bc. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USUYG1281431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3c42f3ce975c128b6fdc2d0376d9564af62aa8844bbe1b916db8ba88dc281f. 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/USUYG1281435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f486c78463f07c2a196cee79b61b4f6baf4bc000f77c79bda032efcca8cc7e. 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/USUYG1281437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dd65c8ec3bc8d060086e631876167ff5dd035da62622748327cf95c43b52a4. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USUYG1281438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f58faf20bfa0eed8b84149195e251f94ee045a1fe654f781659fe2511bf804. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USUYG1281439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa7899439a5d5c2cc4a5483f4ca2329f641831e7abcab3278b473dfdf26c3ef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUYG1281440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b6d16039efe7c521591eda17b0ba56d995f26cc8b3db6706a41174fab2522f. 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/USUYG1281441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6d8c8c78fe357f467eea38c8ea56c92653c5e0d02288a777dfc23299393025. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USUYG1281442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9e21e4589596ad76152a538c4b10323371e12253425265473a323210e932e8. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USUYG1297155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a020044796c652d56eeb57c232e60f89e06ba57f07b976ff86bba3108c70aa2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USUYG1495556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1541499e5427fb1da8db08ff3952d8270a8757b73a127e9546b66145c73bc026. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USUYG1495554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cd40a4c2386c78863cf403c7b72bdc0b435105023dcc3b1618682561661ffa. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USUYG1495555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9123620bbd04ae1cb3c230bbe0c9b67d707714753baf8334f79ce70905b9b5fe. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZFYX2522382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9356eb1a4a429968dc220d62ba7782ed6a03aec15699d4f2f3d0ff028e3fa899. 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/TCACZ1745552.