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 0x512d55700e39bc7bad0049a665a1b1b96b47fb11d849b53e6b29440c95dbd608. 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/0720c8cd-9ae6-4985-b737-00887abbb53d.json and https://artists.proofprofile.net/proofs/artist/0720c8cd-9ae6-4985-b737-00887abbb53d.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 0xd87f5ef64cd47742a5c1b27bed65196534027ca06cbac7dcad15bb80656731e7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6N2189196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd233c3008804e0a91c1d59d5a8bf6b157d0c6854a9e7ba962e7042f76b9759cd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6H2103560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeea835df5befa7db87c91f1feaabd78a09d49ded54358cc549d97e58e35570. 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/QZNWS2195309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4253f31dc7214b76fffb70cbbbeb28416d9d07cffb3bbfb889e164758315fefb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZNWV2116254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9ead21255bae00c85cd0b83dd38aaf5e61bca1190f48874a7ce0b290239ff1. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZNWW2193769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973026cabf4d468d7726dcd130b37e9a2ffc604553e19f03e34c47c7593e1cb0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ22231845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9e7a317ae4b70e9ad54bf70d01ad6a516aa0218f36559a0f14801118a77e00. 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/QZFZ32248638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733f139716d168e1881ef58dc01489235a2a6979ddef482ff7936e5b85d340ab. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:00:28Z), 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/QZFZ62288534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746ef3bb6ba581bf953d152eca6a30ad0ffe1a5ebc7a044918bea2852ec5add6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZDA52283240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c144975cbb157b438cc8dec22b464cccd808eac0551dde4ddfc0d2f637f6225. 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/QZHN72202432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc99054853e2d53fb9fe2117b8ae1b3ed56798d58fbbc6c34834419bea1f5627. 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/QZHN82226746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b56fd17d86da2b871547879cff2c430b0805e42996c9baef2ee14d7d7a9947. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6J2264706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a36ed393b51b6742738a6f5801aa0c78f595a50f72c4a67afa6a97fb9123f9. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZMER2296441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb013845f49b3fca7e257aaaef070efec5e51f2ffaeb3c09e1b6a0783e4eb2701. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:13:29Z), 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/QZPLR2234860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cacfa7a5f2995c642cac92ffc9cc690dfc0ca9af17395763d0cdd55ed52a08. 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/QZTB62239107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ff25534391375493d3726d385249b6e29d244675634bb8042d095f640572ed. 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/QZDA72314685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ec9e7021eb7c3a6901698739d2e848f91302c8f9a823f2bd1c66070da08f8b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZK6J2363706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e492d337f6025f2c25f7d59485c678da69b95489ef4d123b869da095897c692. 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/QZK6K2336428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86b1784018ef6578542e8cb78006e010ec761b84a90d0d6fdf8aa07ae66ec1f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6J2363708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c464e71ba98dc2b614e7eabbd440d79396313ebd0dbf4f547f8e61db2140a0. 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/QZHN62356938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079f36ff618429a8d64c747f29a2f0fd039b7b1af7a2f62be41dc42bce7f3465. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6J2363711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca90506a7fcedb7ee4692a1dc545d1db5ac67ebd65685f4aa5f3013275a2254f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTB72310519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704c4b246f0837a2854e5165569e0e44cb642732713b829bf25ada1b58a1340f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN62402045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525df4bd1d94edc621049f519cc62947b8959b5e09957f7b39504fba077398da. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZPLR2453717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf635b5888d357f01b216d487c22069b3ade7f93da4356201058e666fceca44ef. 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/QZPLR2453721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b951321bcf5f3c4dbccab325aeb75795e22fad6244894bae0b370185d92c51. 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/QZWFR2481764.