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 0xd7cd93aede3f3cf7980227f8bd96fa597b7d7aba60d98b7cb0f13e3fa9367e04. 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/9b51f9ca-49a7-4f31-8f00-03a7da3fc045.json and https://artists.proofprofile.net/proofs/artist/9b51f9ca-49a7-4f31-8f00-03a7da3fc045.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 0xabb1622bd6c001fc1549e9731806cb487755f9ba0f3d728863aa7c07fb3c096a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:45:22Z), 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/QZZEB2417514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbb5305021f07130b82b34799041eedeb19249a5c1d308bd57e22c2d62fc402. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZZEB2417517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb32ec7931e731d26bc98841097ba14a0d475c49c8e374569e50795fd2c2caa0. 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/QZZEB2417520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf517e01a88eeeb14ab3fc58b01312dfd3c5c5ee328450583afc609caaabaa4e2. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZZEB2417522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd516e03fecd5719360f5cc7fe53a1cca20dcf0fce2e2605dac95adce13a5a850. 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/QZZEB2417528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345a4c0b59bd5f30ed366e2419d23e13dd6715b69375274049f9f1f540961315. 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/QZVEM1868115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cba187fb75624d6adef7c80a7dc41920d37601f4402b13629e8ebcc888dc666. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZVEM1868116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c25d95d9f7f2175d13e32ddbc7cb3d53b343f819a93c476eca54869f45df7fe. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZVEM1868119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06cc0f14f9ba0e85f144f497c30cfb9ccc6113cd99538a6af2752fbc9038358. 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/QZZEB2439772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fe400dd90bce781466c2f131ebb973364cd3ad8bb118914a4c84b789d944fc. 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/QZZEB2439774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c4415b04862f0ade902926f6de73fe42a12b043d37ed168ab28cf162d37db9. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:38Z), 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/QZZEB2439777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94dc7b15c11d2ec808beb7e896b1fc49ded17ed93a86aeebb4beadd12138ec3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:15Z), 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/QZZEB2439780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5768a010457d3d1948fd5a5c9bbe8e691d798084c4416c696360c0f410c3aadd. 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/QZVEM1875576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb012e83365ffbdb17dd8881357650544420a6a8c35f8f3dd6cbb696babee20c7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:49:20Z), 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/QZVEM1875577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebd7a4cfec7d7ceff3180e17b840e9a557e6304eeb32b3030d015302b1418fe. 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/QZVEM1875578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a46c1dd01d54aa3924134552be88327d5fdbdb1be81a11e75ddf7b0fae0e12. 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/QZVEM1875579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d0a5ec6c809256fcdb7ef632e90268e07a8b4809cc07e3d598fcb62925939f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:55Z), 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/QZVEM1875580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1e36afef0f0c6636869422c9f34a16c18a88d1edccf3e6966dffd90761c3b6. 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/QZZEC2478936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9429d1ca71152caa6cee0f71972558f667ba8116934ca1b1caf8cc4fddf6b821. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZZEC2478939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281884902bc21bf3b0442d4d7fedb94d1d65134ed43493b47fe862a880a494cb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZEC2478941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b3d18ec954052a8984b62a25a099f37ea08db510a9fa2a248a2e7ad6f1950. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZZEC2478823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe662e4672f73dc82ed3c9f1e904e5bc9e46d8d2d7720ab15c838e9d92d04fc01. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZEC2478827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f874776d34b7931f2ccc8c34bfa1474ac663c0a15974141b6ead5ad7547dff. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:36:17Z), 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/QZZEC2478829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d6e5928c0e76ef57e7e73865fcad58bd101480c556be97b7c9a866f7cf6bdd. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZZEC2478831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d652ac7c53261a0e98320409de7cb476075a4de32362e47a8ee21cc36f5f34. 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/QZZEC2473402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b514d12b3ed69ff3ef41941f2f390a0e91fdb050deb98af67ed95211cf0c735. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZZEC2473406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2188a234eddb92c02b37fa8f6c99825fa4c3873477ee1b8208130fe9d19169. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZZEC2473407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b438e157ba05c3b7d3b724f0b8b6fb74dcb4a89a1073eb510764bcfbe7cc7. 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/QZZEC2473632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eff2854cfd6d4be910132e5a678a71d9fca570e0b6cfbf3b99884aa44e6cee. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:42Z), 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/QZZEC2473633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064f4e280fb485c73643491caf2d4ea1b85d8b45956e0808fcaa521c7075aeb4. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:28:31Z), 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/QZZEC2473638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb430b49c35ebb77900ffceed687ad76bfeb6ea19d5a715148149ee1a5d506dec. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZEC2473657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a54434e8e7e6a952c01c8003e8d6ae2058eb32ebc076ff52095e0245856c6ef. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZDA52505119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8cae42c1ba929025dc4992480c5fdf17c83a61f6f5001d62d92d977bbb5b4e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:51:49Z), 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/QZDA52505120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9d22fd514e89ffe0eb50ceac723d2d4fb4861497e5fca8d2036b93100d98d0. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZDA52505121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8935c0666bdf32fd97d5ab7b645373c461abd03b6e744514941954d57741b761. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:54Z), 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/QZDA52505123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eefd67560ceba4127c8a66f3546a90d5e62fd4ed832c4294122f9a7c142b1a5. 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/QZHN72548054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af1bf70476ec740c58e3555024933ba9d0b5b0d4277786bcf53ede92ad372ad. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:11:37Z), 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/QZWV32544124.