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 0xf6153756c2d2c06245446c2ee50c30cc3ee991d3afeafae63e683ff9ae11efd1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a03310f-af20-451d-994e-54304f5c81ba.json and https://artists.proofprofile.net/proofs/artist/6a03310f-af20-451d-994e-54304f5c81ba.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 0xf4e56559eec608b2662cbc02637b9064b7dd02452378cf4407f7aee364e250f3. 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/NLS6R1841795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb36fca4f8cb58a5d08e04812462f8fc0ee180407346412a8a7f600cb4d69072. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/NL1AP1949710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa51bf0b48494f517cb1cb43e48d5303b01934be5f695c0d36d2c77dd5ae77a. 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/NL1AP1949712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9249f235ff60a9faadbdbdb1843b884eeece163cff09bb330f579eb53dce40. 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/DELJ82006648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5893df4508b6e85b692c7c8c8fe1a780391c20c37597d80008de2f46f51e35c. 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/DELJ82014528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb96a9ee8782583f657fc27ae114f510d42b10aebf20d5ebcdca17462d55b1ab. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:32Z), 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/DELJ82014530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49266cff0729b7b50ae5d68b8a2ce4d4388857c654a0c65364d2e6dde495cf5. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DELJ82096414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3547476d87d0c18855a8754881ca82093dcf2192152501e5a303c2135a95e7c4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DELJ82014531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a845ac10080897d33992fa4cf5e9d71aee8b11e4a68c214966aef42075f30c. 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/DELJ82014532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250603cd0fabb282359ccc5ea3ee16040499815176f95990b6047c556a01a978. 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/DELJ82001257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f9cb018596181f6586669b5f429180be7107376420ea8c9e24a62fa031d33a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:56Z), 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/DELJ82014534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01400d0771fbc418e2c305169e3e45bf0b8d8c96c0ab6ee7c1130d65a07e3c1f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DELJ82014536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8849732a5d572b3f509f6b91cf19dd37460a5c1a22d3949b8f51965d98023e3. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:54:42Z), 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/DEZC62107013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb889cfa012f4b98f8c41bd96844714624b5f3e08a057a54d540e2605825405. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEZC62107015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eedcf5acdef46afcee6fc131f3b11949e818253e2885353af5f7789707acb4b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEZC62107017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac46ad4d56f8aef6351a84ef0021b296f12ca6bba2b800471dba45d63745ac. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEZC62107018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06178b2db2ca123decac2163c8d9aac8d44a8ed1d195a43e9437243edb004ecd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEZC62140790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f29d1962fa354c1df31c430c0d609ff3c3b47402984735863634ec46ccc7d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/DEZC62279673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3686b856e089ada2395df7a74bc7de18765b2805bdc0af791fc34a93500d8459. 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/DEZC62128926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f29d1962fa354c1df31c430c0d609ff3c3b47402984735863634ec46ccc7d. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DEZC62279673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06178b2db2ca123decac2163c8d9aac8d44a8ed1d195a43e9437243edb004ecd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62140790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f65359989c1dd16ae0803676ef8095fbfb71bbccd1bf8a7bbe4f5f4b610cc1c. 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/DEZC62290060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51980753a4738f5374acadb4377a0e7fc32c06bc94b79f60bb4c56a9fef980d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEZC62249740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596a858a32c5a1e5999cd1fcb28a0fd78f533fe0c9bb02990879a110606130cb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEZC62290061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293db00969734039e4f03829d8895f54144cce9f75b0ad66a6c6402fd88209be. 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/DEZC62290062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383d08bee637ab8998685cb2c3809097d77918728fa0491a8d5097cb3d376776. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:18:39Z), 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/DEZC62290063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f9461d42365f9348e2f9ebf047941f38eb7edb0f73a8b641ad6d823fefaec4. 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/NL1LU2300075.