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 0x505a584939353d8673c3232f0c98e899c3822f4f1cf6e4463320fbabb9a1065f. 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/f71dd75d-f8a1-4a9f-9cf6-1213456ecd99.json and https://artists.proofprofile.net/proofs/artist/f71dd75d-f8a1-4a9f-9cf6-1213456ecd99.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 0x89f246688208b0fa37b1737a3f55f4f680274128085dfc281d85b94715796bd4. 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/TCAEA1962330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07f9d74ab45974c8a2c8fecb7cfb7dc4558addd743f719401115c48ee8b4268. 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/TCAEA1962333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3596668ccdbcb859b2e6cc52a78c6962d425c6c1aea836d066edd418d3322f7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:42Z), 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/TCAEA1962337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec67e4c8c74a892128e2c15167364dcbcb3be30d6cc83f3bdc9e27d70aa0b03. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:41:20Z), 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/TCAEA1962540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebeceee268f6411f2ddd47ed301ab630fab212bc1792aac949c1a21cf825cce. 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/TCAEA1962543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293357c95f976d301c9d7b7aa7823fd2c76b3f5824053a4cf48038db49262c47. 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/QZDA42160129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9855dd1833086af033bcb55dd8c0b4501c21c0e89bbe7f8841c9b8d07f34812. 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/TCAED1964506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727156a2c40a0db51fadf2e5deef71ce4166be20f21a5713d3c5318e572cadff. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:23:13Z), 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/QZHN51909441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c5de5f911d699f4102a739c6a912af52b388e855106a4621805469008ee345. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZHN51909442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10aa99c799a2018354e8e1d1cf7f73d4a19b4b94c009d12c8e3c84c3f150de5a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN51909445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e8e27f9bc0fa464bb9886d0a743001ab9320c7895aa17855dab0973f61ebb6. 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/QZHN51909449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c3c5e76169961ab8a09968518fb8de55f5766dc23f853753a3b1fae83ff662. 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/QZHN51909452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324bd2748766b852d081f1420d855bb38524c21505bdcf91cbb6e1864805ca51. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/TCAEU2086077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f6e3507b306a2f3469c737136bd107d50e60004f2fd453240af4a7b2bf655. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:03:26Z), 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/QZFYX2254716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a1ad95e2d1adf623e9850afbfc1c10ca43600e8eab043a94d30676215ba6e4. 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/QZHN62205792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0122ed83eb3e26df4796d2875462f297feba750c60a48717e36c08110d61ba. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZK6H2223737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f99fcfc8a6a92a2ec48986f3af665a7f80a3f159108fef0867f2d28d78a1d8. 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/QZTAX2271144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573c17b8838e344047e111dcd7c4bb7c9ddb62547a58e6a5eb7c2a1577274eaf. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCAGS2382262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f86519878054333458da9bbf835b4e34071220b4b2c6c111bb1bc941275005. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:44Z), 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/TCAGS2382267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0170ad78edace36f783058207fa56fc7e8bc862258e7fcda2b47d1520353aff. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:55:47Z), 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/TCAGS2382279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99203f067a4a69464fe7ec7328bfb28537621d3ec2d6b03faebca41709d6d8f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:31:15Z), 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/TCAIJ2492589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bf1ea8aaa46a5b68842b8a5bce42b12da8ee87abc5f6cf78097b6616665ee1. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZTAW2416600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99203f067a4a69464fe7ec7328bfb28537621d3ec2d6b03faebca41709d6d8f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCAIJ2492589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d064388a7c00f4eee5b6fc5318bd6f9e8e970a188ac105884a38bff8f0ba434. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:40:33Z), 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/QZTAW2416606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f93f312501f709978631522e1aa0126ae7db706b7c1b544883f25237009a0e7. 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/QZPLR2453294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b61c341815df0a03966d84888f5397cf7f439cc44cd2ce374e554e6a8d0a5c8. 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/QZTAW2416610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8142f8e217cd76152c4692eb153775f09d796ea09a1640d5035214a656690a5d. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QT3F72547893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78b329fc6c5c92f9521a815506bea0cec111e815560703ef9589a00fd228efa. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QT6ET2501072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d4490ddbc9450a4e9864220b1d1a0aff2e0085276fd3fb67fc9d860b6d56a4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN82467107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729681fc90177a19fd0ebd8efe72c76559d315d37a8e5c342b9cd969577379c7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFH2323222.