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 0xfa9c4a7cdfd89ad7e96032f8f37fa2251ed495850d88b0b949cf648a56b361d2. 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/d8adc621-e701-46e6-8938-79af4eff18bf.json and https://artists.proofprofile.net/proofs/artist/d8adc621-e701-46e6-8938-79af4eff18bf.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 0x68895a04f6e23452c1cac96eba5c0a84e533759e10c2630b3c6e1e5d2bd3ffc7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHNB1984110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f04edf1853f7424bcd2d444d230b21ec8cb05cd820815d2c5f0777b8d8c157a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZES82052070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdb9c599a80c628b25da21591c127ebc89ba58813f4b9719d5ca4b32519ccf3. 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/QZDA62183781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8543e4c82cbb9c98dffda811139d67f54f7c7300eb4ebe5f20f692662424d2a2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:03:07Z), 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/QZES82152010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee9e5e4c5b1fc16636507fe18ef7f3b0b65281027c4ece3f3ca3966d2408b56. 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/QZES82152011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2cf977de7f24036966dc342a993807993e8a163ee990dd3779412834d4f674. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:09:04Z), 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/QZES82152013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3170cd08d5bdf82df6c0650084f4ead26594b4950ed885de0975e64cae5a3a17. 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/QZES82152014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495bb1684fae1db12808c605c41e6846a3816a3417f8751297859309d0085c4c. 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/QMDA62276786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2ecbb56b375d874417aaa5a294bdddbd00d625a8dcca3e9636314e89db3638. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:06:37Z), 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/QMDA72242519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b76dc8c3a0dcbebcd4bc69d0a6a32df31025510dd90e2009b61b6ccee21258. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:53:54Z), 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/QZK6F2368054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6281036ea13191f95a13161bec5e052975b3cd7b488be403a4ad9b847f67ec13. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZK6F2368057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3810e9b53c3063fe973a85cdfbce93feecd8afb7a07233127dc758bc2160a39e. 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/QZK6F2368066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba7b6757e18dc5f545dd4e03e339a6c69aaa3dafb9fcdc61f5ad7c67908f9e1. 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/QZK6F2368068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603c701d58380bae4dd6657d4851703be65d9205b78764e44074d8f8a32819ce. 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/QZK6F2368069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b76dc8c3a0dcbebcd4bc69d0a6a32df31025510dd90e2009b61b6ccee21258. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:45:16Z), 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/QZK6F2368054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdb1d642fb8476925858263f66017972533c2a10257b96b482c1e8516c4baec. 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/QZK6F2368058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3810e9b53c3063fe973a85cdfbce93feecd8afb7a07233127dc758bc2160a39e. 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/QZK6F2368066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c5331bda12c3a3028e1e7adfc0ba29a499b83a4b2180ca725dbdade5a3ffd0. 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/QZTBC2306442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cae9b810414a4c785b0dd29254131b21eb4ad0c5a2c96e482b9dc4b55a89d39. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:29:34Z), 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/QZK6Q2446121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837aec8ac0ce83ee8e9ef81fe1da829b24a95ee219ccd9216fadf64763f904ba. 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/QZK6M2445583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ce036a1835dc33e1f8773fc679a08d15c4b33007ca2d65d236934f5bf9bda0. 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/QZK6M2445584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3a201e051219503304e00b60a3b8423f04b1552f86115f0ff6af4c9dc36799. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:03Z), 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/QZK6M2445586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54d7762f2dd8e5cafdd6653f9beeb2a2c1457d3e834287a67bac84da5d6f971. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZHN62575599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833322c8c3cef3d356e990f8c2c0fb24c4111326afab24a35adcc0f5a35a68fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNB2518890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ae07851b102d9cdae69d1194b5f85aa65ae2789ce9a5e0400e8c38d7118062. 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/QZMER2541543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5debdafba8afffa8ccc9fc8792a54129edb443d95ffd665a532389e391b7cdc8. 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/QZMER2541544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645013f64c2b04992985e12a7ce2d81323e48dcd21071928d74818a52d101ff6. 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/QZMER2541545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0664fed5499b99af6574f66431a74ce24cd7c636fde1cc4c3b30b7770d4ebb35. 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/QZMER2541546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b98fc785b387593f251f100995b3514dfa1b6447cf1af8665a68bad1848880. 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/QZMER2541547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca833322207ad0c402a391663d8014af3aca4f0adbcf8aaa3f4f0d898ac9f6e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNB2591409.