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 0xfc7cbd6b66e81fca56347c77a756a5f9cba25a13205e23fac1b1698bc724c13d. 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/02541208-b4e6-444d-ac08-b84485f2e38b.json and https://artists.proofprofile.net/proofs/artist/02541208-b4e6-444d-ac08-b84485f2e38b.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 0x33b8c76f450fa48dfe68030a36a8cab2a807cb9168688684f124eadc7b669b20. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USE830919361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d3830e6377a1d33fb481523aa3393f10e5c0e3889a8f4c1af4f34aeaa9d62e. 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/USE830921441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167d9b30de6e09c621e59604db12c362fd46bdd8ed052de21c2877dd5c42d838. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USE830929103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad96ee1ae7cd689067897f6401357ab50b906d039da328272b90c4a9e0d5702. 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/USE830929467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebe97ab6ec9e4325c6b268f89988d0a84ee6d1f496727f84ddc02761f4fb6b6. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:25:19Z), 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/USE830929474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc645b412888de83ca34ee0dcee029d398c9ddbd290f8686d7d933db5d8892a48. 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/USE830932713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5383b7756c139de04c8fb7bf6c7d0ce1b2a387da093cbb898320ad86f7788b4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USE830951854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83435feae00e17417734b35b8014add97455b8cc6e35c46989c4caae7b224b49. 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/USE830967013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dee72c6e04105a88d8d1fdc1b822d138a2bfeed419c76268bd7e67fd90df1ef. 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/USE830974657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9873ca9d76075e1e6f78c4a87cc3a17de49c97eb6965e5d64d8dab89eb241870. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:30:08Z), 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/USE830993705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9e8ceca7d11a211b9246a63c1ed0a0ba2f4dc21a9b3d05959fff32f225ba17. 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/USE830974338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81338106863a253a1ae18ccefff36174338dd91bc597a0559e8a130fd22beb58. 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/USE831535407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75725dbbfc1cb16c47318391fd35299613d2b73fe6c0391569772f0d8756cf66. 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/USE831541947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0ea92ae27d16d43d259e4bd6a603bf59f3805166d5517226a6dbb4ec1415f7. 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/QZ22B1741256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6441ec8dd211a69f62d483562ccc5227f6dfb2d6d2749edab63e20bfa0c6106e. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:55:41Z), 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/QZ22B1741258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aba60bacdcc6b1fb789c7862b0ed9b4168abd6c63a1bb34f54c97739bd3a9e5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:19Z), 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/QZ22B1759480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c368bad7e8543ae608eb4ccc1fef2fcd40a6ec81ddb8b814f4a260b40d76122. 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/QZ22B1794552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda0735faf06e71d0fec1817e42be9edce7f873959d6398f0b9823317c8f68c7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZ22B1808989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26494242eb38f055598131e85f04290ed717e03c1627a1551f71486d78f0db28. 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/QZ22B1851116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74e42c8d8da91972a16cd5c43c0c4547c36a748253e834de2aff51b3b2d8c0e. 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/QZ22B1864097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13be5b65d4bc6cc1981112379c902ab3ad488a1717df19dd30424094669d7d83. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZ22B1872962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7428c046c9f71a9280605a22aa5cc45f37cb375ddb93bcd7da016fb4cbb75adc. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZ22B1903644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35518a09f38ffba5dcdf73da1e9553ba44cbc90330ee5a735cedb646664b599f. 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/QZGWW1925625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08ffcba01ff5b2bbaa81345ec2bdd7de11547638c2b6c7c59cf3f7beb76f8f4. 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/QZGWW1969932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cdae8b9285831c58d707b738188609f8b99c3144fc12c0f34876d5421be8d3. 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/QZGWW1984699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d9b461a555d5812fd392c282577794238ce592ee54fa9a0fa9132bde1432d7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZGWW2103817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a325acc1a709641b464dadc97f2fbb55dadee9e4fb7e7d6b97320ed26343e37. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZGWW2123168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e6af6355853e91df62236af9fdb9b72327900b78d1c99ba3534fc6a87b89db. 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/QZGWX2037138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8a8dd1486f9935a0860a7e7ebe5566ffa63115ae2c4f760039932ac1dad975. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZGWX2063477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3616c09b1d944eafdfaaba39603d518ef51473eac08051aacaa1695674da9bc. 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/QZPJ32153608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cc467beabbc8252f14ef80f5e6c78e6d32882882e1728a6f2f1e9bdac791a3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZPJ32176507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64e3adfd8292dc6898dcac01ece86aafd499e473f63e5744932c036e7369cf2. 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/QZPJ32222908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41162561d4ea1d53de51e6d7ed1c8b4979d819c0729cd3ea62efff2e937b645b. 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/QZPJ32326635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425a8d5a0c40f3ca28c26f4f7583149252c78a9e235e277ca06f284938aed4c9. 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/QZPJ32333619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97be28ada5749b09f14972fda513def0b1b3bf98211a41d3f7237b3e24b8e6e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZPJ32346713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe239b8d51ef2adfff7e55545c2d36b8c1838cd9b607ab7ca847a2acf9421116b. 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/QZPJ32356984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973acf559bdfe2ce8d86545005f4f259885b2a1983435604b67abdbe57f31912. 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/QZPJ32373772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8013a0c6866a8ef5d0d5fd9934676bb6718c302792ba19aeec34d494e336ee3f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:55:17Z), 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/QZPJ32378112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a98e7914c1d992867cb0b485c8206a2682f4a1d84aa4b27fab2a16cb1f147ce. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZPJ32419342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0c376d38a6dd7b38ddd5fa9fadae438ac2e032da539629b680b7843b918d17. 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/QZPJ32429945.