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 0x76b2cc18ced57af60cc383299b945e7711219b76b44ad50bc1569350b85fdc59. 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/368cf86b-a6e2-4d6d-8be6-f9436f80ded1.json and https://artists.proofprofile.net/proofs/artist/368cf86b-a6e2-4d6d-8be6-f9436f80ded1.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 0xd45dd5c7f3566a8febd8cfa07e2bebfa22b32e7349159eb488e824db7bc80db2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZMER2385363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7c821bad897ef09ae75dd53f5693cd63e39f1e723cd308b2451fbbdd1878a9. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:38:30Z), 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/QZTAW2382985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda46449f8d472c73960af4269eb31fba32fc5989bbeaf69eff9870111e05c4ca. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:29:37Z), 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/QZK6H2480030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32e199dc814949b4013763c89d7fa44e79b487da9b92f2859eaaf2e1e83408d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6H2480033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a8b78a3611ba39df9e820a568d3996f71ebf40e43571d8ed75ff66cf4e35c1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB92459487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f239028b32fd7f8e97cf56df43c633e29adab276262ac81e24f0774abb1cd0. 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/QZTB92459488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa973d1a71a198ccb910fe71714f35c837bb9ed307a545698adf7c3ddf56d539. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTB92459490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520cb0987c6e9762e1e562c50cc4e2033892b40d572e0f2f7adb361b9ef16bc7. 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/USLD91768140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abde68138b965a06aee49b489791a25a6ac464f9b9c2f8c9b3945a2cae45037. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/USLD91768123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f549350bf8972ed1b168e0f43a76028c85f4f8ba23f817ad1fa07a694f58f2. 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/USLD91768124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3b2caf77a11681d1dddb8a31739f98b1003ef09651123d892ca23358325ff9. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/USLD91768125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c21f0ce6d14615e1676de20c54a32c41ce2a22351e0cd1e08f2553e44bbbab. 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/USLD91768126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d226e230da870b9dea73ff830da7cc1c72a2d660727789067731a2988ca707. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USLD91772671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac733b34e66857599ff28edbc73cd7c9f810b732b6801bb89817a32a20d1b4c3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLD91772670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a41c3a6a168f7d1e44225a6c0e17951eeaa61900f4013eed91c077346bf5ab6. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USLD91772668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0822e60fbe15c3e2751f3dddda19aea40fb15aa66f0f251a5b3f1714cfc14362. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USLD91772669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac733b34e66857599ff28edbc73cd7c9f810b732b6801bb89817a32a20d1b4c3. 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/USLD91772670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd3c3143395edf56c50527241baac74da7459a99387b6c3f0134e0d6aae9f43. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USLD91772673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb837d86f2bf7608135bcb1d664714ab3b7028c6113241678f9a41bcddabb0400. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USLD91772674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc463480de406ee0b09546c4d52e3d1c43aa60afc9471b7fde698f10fc9510257. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USLD91772675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bbf0c2d84726ebefcba11d6d13150f64284cad61bc2a92068377e8ce2db6cc. 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/USLD91772677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3176a965cf982b0d39b1ef2ab7af657f5201d56b8559d3235756fc6bf589930. 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/USLD91772678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7787c7df2876e6d01ed9145f6a5399c066a580da98fca78573966110dd0305. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USLD91774880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d803d917ffee5777ef8fb6d127ff6104d5f71c1a3ecb06f816a430cbfb5f786. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:46:04Z), 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/USLD91778090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd668f6e3e6a0a26cdaa686daf77c1a3d730e99556c2f13e2e8e9046b3bc598a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:43:06Z), 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/USLD91778091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe25449a82cfd6ba3e8c186d1e54e24a531fdb1bd520b9d840a39c5bcae27ef. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:37:18Z), 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/USLD91778092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0752c50a5dafe375f25cf9c448b32755417a5ced6029d6c9c5c7cb4a395aa24c. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/USLD91778093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321b342b9df2fc311669491c8680a70ce444679b8ab8380b24cc48fa871e21b4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:42:39Z), 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/USLD91778094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb2a635c947dbfbfa6cd57453bb619fbe271cfaec0edd61ed8ee18899b41a97. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:55Z), 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/USLD91778095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ef2e0092f2a6c76df2d3a657dd3918fc8be938d8f8bcec4c5e4aa3145fe39c. 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/QZTBC2488622.