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 0x16690869c4fe10bf02363a683616e2f6b3ce84c99998912519f91f8bbeea406a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af4dc6d0-f172-4fb2-ae3d-ef3f9b5b13ea.json and https://artists.proofprofile.net/proofs/artist/af4dc6d0-f172-4fb2-ae3d-ef3f9b5b13ea.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 0xc6a133f1a883f9c364ac71f648f7c45952e12b4cf57442f31b4811bffa072140. 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/QZFZ32130862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53aa16d626856ac1d5a82240e5e55e5ef2ed40ffa3fd930e255724c631caba9f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:16:54Z), 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/QZHNA2160143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc834207322641ad40eb3919cca2dd7c374c58515b735a0d6db985719a2f66a10. 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/QZK6H2173656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f9a2f1733fb6c6a938a8b01eb7e8f241c532a2034a94f7d9652b09f34a7ffc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:12Z), 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/QZNWT2130653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c45be9f5d73225d6aee1ba61800de799f225406a3c0073e1f0c5224bbffb27. 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/QZPLR2138039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5fad282547e268e4e59a024f8e4d5272e281c44c8d07e2f4491ee53f02050e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:43Z), 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/QZK6J2278807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa923e1e3906364e4468781f32f212bce6cf39db4b416271b13e2b27498dc4789. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZTB52209066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ac5d517eb3aa36854643f403e027c80871d73515d4ae5368adcbb213b6c02f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZFYZ2381711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38286c8e444ed50ff835cf338d3d58ea54beb833be2db7642710efdbb9fccf46. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:44:00Z), 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/QZES72397186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d58e3e25869ae62746a2dfdf90763f498f8847c96d967912c13771456acf1b2. 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/QZMEM2319108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64053fbf91b950173c82e8e3ff5851f638244264b671062aedaeae5dc65be13. 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/QZTB32381523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebeb7594e647d4191b2e7d4e5d9aac808f791de31b0060db0e3e83ce914ec3f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZFYY2478882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4701c40ff9e95c4aaf8794b96a55a964e9959c577ca5c253d89bdd1e9353468f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:30:29Z), 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/QZHN42475885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028cc7e45191b0701ed6d7251624d47ec9b209f4500b07472f60a7fd7c368a41. 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/QZHN52420125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a1fb561c667c237a01cc04c1da7bbef9a1063cf38726b4ffa2c5ebc9ac34d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:08:31Z), 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/QZHNB2479979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63687002ab3296f0a9025df57873cb759e50d32441817f61bfc9c9e783812947. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:15Z), 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/QZTB72427066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8782149ed9e6ea462df80d96db06fd4c4e7ccf97209f7f1110ddee16458e9712. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZWFL2456883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c14fb8876d90dde584a13d1c5fd45abe185cb5e92878b78807551df2abfa33. 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/QZWFV2499089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf4ab1742f771afcdbf8eaa82464d0d9b2c42496f32d8f20fbef31a094a3e68. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:41:50Z), 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/QZZ782491930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd9551f80db0283a1697be0e636e99eec0e49d5c99a9aa7b09172dc016a17c7. 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/QZZ7Q2446886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70967054e943c6197e51276e02b4e3a480496a216a090c26aa4600bd3eb597d6. 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/QT3EY2426679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eeed47fa87d3b54231d561a7325143a61c40eefffeb2b0f3819781dceb84bb. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QT3F22477135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486d83a53b4cfdb83ad9e5d10ab3f5d27f1318dd31572fc4309fdf18fada5742. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZFZ22589124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da4495e9a08bbb32b0330e1a28018f73334078995bd74f993548593fee9c781. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZHN32585044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13023fa225b9734e725755d5d5ac092c84b64dc4195f39c38f43b331b880b260. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:22Z), 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/QZNWQ2542373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1936ceaf4cd4295471e4072bb051541487f568104294e3d84edbdd0a11b223b. 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/QZWFT2583434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91509c45e1047043329f945ac571d890b3dcc050660501ab4987985cbbb1f70a. 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/QZZ7Q2516382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d3c98de7b9d91b77a2ead23bfd1af19054eeb6e8fa31efdc4d1748196d62c3. 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/QZZ7U2538161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f56dadeb982cc41d9f8423b9baf35109f9539435c18ffe3730d1c2cb54ee508. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:26Z), 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/QT3FC2518786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddacbb5376f40e60d69bad7cbbc3646ff91511f8abf713ca5f1a2b622b2c9322. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:44:43Z), 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/QT6EF2574530.