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 0x9b61a2ce4760f9879446d783d1735d40dbe16033349a9a37094a365234ea4749. 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/5a784e9f-2d6a-47cb-9af9-1425827e0731.json and https://artists.proofprofile.net/proofs/artist/5a784e9f-2d6a-47cb-9af9-1425827e0731.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 0xd46082e0ee5b43314981e77e1b54e520085fbcabc0035b69931e74e3e73a770b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:28:04Z), 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/QZDA72121406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b1a03df9d4dff1303e1af06774119f3e767938f0e890c2906c2ad377b64517. 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/QZDA52114970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2abdde053f71526c98810f39fb3f4898c0c61bffd8e6abb40cf95c5694f2bfe. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA62168663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf736c35b11fa98b620d1558c341d5a8acdb73a4e63ec6304be834ee4a2a6b1d8. 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/QZES92118610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed9de1f3f03bcb73009230b6dc56e061ea052f5233867d6eb272d6f58340a42. 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/QZHN52110316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3097f6ee0cfa39fecbcdb202f474f1ae30b8acc807a1931ab491320327bd46f8. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:29:21Z), 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/QZK6M2134359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a2ee61e0ce60f4f1e509f82eaf5fb9a9fb5538049786400108b7d7e3a8b143. 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/QZK6M2173735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ddd22fbff473a84e1ecf4fb812bcc3373c2b0d28880da9f5cbf68b903dfc3f. 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/QZMEQ2149705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03292969e1008abc6f3b468fc5d16773a03b68b3a9f38c0ca9bada40492ac9c6. 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/QZMEQ2149573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7120ca4017176da44eb0bdb651ba54e42d02d5fdef9b398884993c24c7a255a2. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:15:57Z), 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/QZMER2127242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fbec6d83d2ac238b0b475c8cfe49e29745ae312272f3c9f557935bcc356a82. 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/QZMER2127243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a81f0248b330fe3110582a0d39e2296955ceb6971636828604b8977e1efb4eb. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMER2119799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da935c53b6334a70249f17573879a7c868ab69a62d720090c9db6b47226ac71. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWW2139808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa371eed8c77e5331f0e5131e1bbd6f2dc214f37f73c2048896be63da1e1c16f9. 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/QZTAT2183780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef21069df3dacd54d5eab4e3121b3438bcf9cd9871c65b5a77a6de07610bfc4. 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/QZFYY2206101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590182d159397534556dfbfd1bc544bc9e19e5921a6146b74f92d806bcf90d54. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHN52288052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd0b40c99477fe7ac41828ccc764aa543b4c088dfa5bbbd4aa31928f3cef317. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWS2278980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3041dbe4a7ac5d665d9cd61aa8b623f74b0501d8efd52371d9eae6b3f7ad92. 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/QZTB32218910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6100ac2cf91550b40a564510b7e0e475393481cc75715b11654b06434cb78533. 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/QZTB42265387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf214440df73c9be3742834e790dfd3f420dea08eb102f98d945325fcc85416e1. 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/QZTB42403084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2cf176dbeee1ffbf299dd4b26d32fd1ae81da71c6c3897ca5886670cb94064. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZNWQ2310231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25896ef46fdcaa69c69fd09aef3a49ce64d7d18db8e21931bf97366e816d9910. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEQ2343707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb71fa36c87cbcd146653ef51e3b6c47e91c3d3574728a2e276b01c61f577c04. 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/QZHN32409985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de5f04e28ca72572c85ff4aa57c90d454d7bc71e1ee56165b9e6a44b3c978d6. 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/QZHN32409986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdab76c548415f640da7f1f6b3716678c078d6afddf8c6a31ead6d98d9a29c61. 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/QZNWZ2494288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404fb11b40d7b1cfc00020de1a9d287a3c2da5b0bf7cf66ea092895b5a3ffac1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:21:22Z), 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/QZTAU2458920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab0c0c767132e2232eb41c71238bd60b95d6c81e467123417b788059ccf6a52. 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/QZWFK2470426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559076baa3b0277a95f2050422b4aa1b55bec986270207b7c27945b79cd79147. 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/QZNWR2515971.