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 0x21612e89b04da12fb0499e2b28bcb1761a0ed32f9e866c70761d69621ed93390. 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/daef5fcc-c4c5-428c-862b-21cb6f3ce150.json and https://artists.proofprofile.net/proofs/artist/daef5fcc-c4c5-428c-862b-21cb6f3ce150.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 0x4878b33f67711a158714ba399de94ff29cba825624122bd0c809436ac66d8b76. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWY2392114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26080bb450a156db5847ca260d3e06bf0a04c7b7c437241730b004f1805f40c7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTB22317966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8867c429e2b8fd8fb5911b7060ad5e1e3ca87662804d5f4e72de15678d093ea5. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:20:39Z), 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/QZTB92382061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c70388b309cf501e9ee61ae8deba18724f4bce5f2f3eac5327ad3739bbb95a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZ5FN2492841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d111d11561c1aff255fbd4123a090edb96a4af921542c4f87f1061a81c4335. 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/USLZJ2440418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c14fd119039aba4d5b61d3ec3418a5999a439238ad0be0b25d30279e8d287f6. 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/GBRKQ2435887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802526ae4c3448e9aca3ae73a2ec23da5d973ccb985519d1367da62bd5710c7c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:21:48Z), 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/QZWDE2479265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ccf422ebd4d1decab65866cf21c60788c3da9bd5c271a0733927e1ee893d51. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZWV32440003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d936f98d92f72c0cceb585223fa0f530463b9cc060fbf1593b40f155f3a07. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ8A2421934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c80453d1e6b05413dd82a1b71d6f32d086b302bec3acf890b107de733485c1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:46:02Z), 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/QZZ8A2496037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e98db23d8d466262a4f2cfb291b4cf1bd22415089d3bff39aa8bb0829e9087. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:17:26Z), 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/QZW9L2418772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de6a6012e39015b6c6e8b09e1cac887a1ede211df987f86dee26e53dab3bfff. 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/QZW9M2419206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0855720a95e4ffcb806157e2372b1738a02bf9962073a12a6cd0b5cc927d222b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:15Z), 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/US7VG2513790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74c699bb02433342314826ad74b0be391b16d18b35f2036460fac65a3538528. 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/US7VG2517883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446fe7080e31d0b6dbc56b389fbed67249cd453771c398a91c005b86ca4a1188. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLM2514265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a60d2dcd67bed0e8ae67b3117752e16e66905fbff61800c7273d63a1b0caf8. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZGLS2550433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb7dfe20450b7b5580ee6f5bcdf809ca5ebc1200b5e089f376d595225179e1. 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/FRX282507019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb7dfe20450b7b5580ee6f5bcdf809ca5ebc1200b5e089f376d595225179e1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282507019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c62d93ee2b9aaf1e916b325e76e74a476504cfea5a0d802d43d54c3bf01f9e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:55:26Z), 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/FRX282561119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df07e11939f355cc59dd26c7eb985f5e168611b8325dfd22de5b8c7e238675b. 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/FRX282569630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dfec97e7d3d6012ada3309920fc57bfa70199e92c8ea9e609cc56b32ed5478. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:14Z), 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/FRX282583562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2e72acf8b21176f55106270790dc3651a9bf15baebbf801c59cae018337148. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:03:08Z), 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/FRX282583656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ec4912edbf70b144bb5069a82dde321f7794da270114f951e28f0ee7f3247d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:41Z), 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/FRX762559288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62896d78c96d43568b2b4cc7a9f0b5c31b6e0666c60d636ed57440faf74a810. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FRX762559289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11d0fd699ddf2b37a2e343467180a25bf313f6ebe9391f339482ca0900475c0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX762559290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bb6f5f607ad783df062755063caa3fb1e2450bc0e623d92cd70ad3afd83edd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX762559291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e1e07d48ab1884642f4125e25fc0d32ad1473f7260d4637f9e8fd0f2b69358. 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/FRX762559295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88469396d670f23e668bbda2248fd552bfac5b0efbf779df9cee1611bb6b9b0. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DGA052519448.