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 0x1bb33a4b62840279370a464755d60cef4da2ae54b2ad0418e1d0620b9f88164f. 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/be1b0c6d-de35-44bc-88f3-b08392ef20e1.json and https://artists.proofprofile.net/proofs/artist/be1b0c6d-de35-44bc-88f3-b08392ef20e1.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 0xbada1f1c906cb87723e8e9c95c37348e3e6f1d844c86247b7dd76b718ab5602d. 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/QZFZ62173548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673cae31cd113a9e2def7b3c2d7c2496e12ab766343cb1df041defe091f3ba2a. 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/QZFZ62173549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965a28332456aba7ae0a572b8b05612b6f55824e1e01f6c133e42222897fb3b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USASN2200511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaf3780ebad2828263ce761df14345957ad0761149e6f27642fad24f8007684. 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/USASN2200585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14527bfa8e53b741de75120c1279ea4937f041dff4e85276931d0e30aab4b3f8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:40:06Z), 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/QZTB92224581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0a4682651f40bee7ce01c707c87eb14027a34877ab2d1867e9de0c8eb65842. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:56:52Z), 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/QZTAY2326290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eb57f1a73eac6ce4a42b9659567371b4cdd9090b5003e90a0e76d936726bed. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTAY2326291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950de6d51e2892b8ba403bcd894b09304da6d3b762819207b86ddf7257826b9a. 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/QZTAY2326292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ca0d42235a9b9b446994651bc85ce4b8e0c50dd3f7e6f22ee606a9bc7428c1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:25:04Z), 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/QZHN92445464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec5404e702a51eae355748c763a1a6caf7356d025593836eaf4ae50144b908e. 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/QZHN92445466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218bbb906adb50f698da17e542ee0a06c1c6688d980ef9e21ccffa383db7815d. 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/QZFYX2576310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30af4f50148ba356659a4d563b6b7a57c1a31bc9166dd732e288ed5f5cbeb66. 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/QZES72557123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7535f51311f0fa2f2b0ccdcce65e9f05b0c40236ab09f9e24284a68869be5968. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:39:46Z), 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/QZES72557124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16ce3f73c2ea5e02bf2eb545fa96a3e808805250f9984c202a2a9b7c147f697. 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/QZES72557125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a12f4425de5764fdcb57257521022c701d9c80b6e059cf6f6223b0d89f9658. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZES72557126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fecec9aa3719f08b23bd471f2f3f259577ee0e2e62a520d5493843f0877e684. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZES72557127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f5d38703fe7462d7b10db288d38870c918411835097f849c56b02da9aba356. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:23:25Z), 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/QZES72557128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fe055231576a2f20c2a7d3d5c7be8c9647a290e6861bbb592f7e63669d660c. 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/QZTAU2438648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212e0be01231e7f9ee31d66f5858805163a71dc100bf9a07980953761dfdfed8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:57:11Z), 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/QZES72557129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268fc8374dc2b2dac738e759a74a70075391b16068236d76eeff23dab88616f3. 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/QZES72557130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26686f03485b30f9fab67792f3d6b502ad1cb5d256bb40bcbbc0daa6b98d4bc9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:56:27Z), 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/QZES72557131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0fe176c0d21358ff483ed4ced608b0ff7f3559c03cc2d95425cc185406b004. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFE2578886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1132734b7de1464682bcc3dfc66a0c45b0a19e46606239b71dc7fc4cf11bbc10. 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/USASN2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee71bab892e2d33769607a3c1a601f9491393af76776cc02549b81aae371d0. 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/USASN2330098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2f02b9c7f46ac3c6868544f51d41f3439f8d124f9de47381dc18ccf8f3cfd3. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:17:43Z), 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/USASN2330117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1232b9e30b776e1aa672cd0f9ed749094d6f5d6da94bb458656f3dfd37ec6a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USASN2200458.