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 0xff9eda67d273007557f84d111b603ffe518383630c891f7c729db14153e11cca. 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/40303bce-0db3-4b59-9dfe-9ac176156957.json and https://artists.proofprofile.net/proofs/artist/40303bce-0db3-4b59-9dfe-9ac176156957.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 0x914403a73a168039de34dd7d01e914b1ca3442ff4acc42a40f4f45082724d729. 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/QZFZ72059148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826738973444340d1d87fd8f91519694e455b8f87662f92302eb262041b8c9ae. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ72059150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd347b55b3560c799eb6e9802bb8f2292a8cb89b286985fa8f351ed5325ac3caf. 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/QZFZ72059151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf454ea1ed5915a48f16b0576e3ad4ba3001588258bb9be1d7dd7ea0c075c7db8. 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/QZFZ72059152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2aeaf9d45cc4e22e90bb71b98fa51a16d0d6542c21181725ff6b751f50ef4f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZFZ72059153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40df8192fa1399dffc641ec61d7c6872b6b8bfa02003d6e91acb9f61478d1567. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:02:23Z), 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/QZFZ72059154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776a68c75f33b28ac5a0e18ccd07d07a57642315dbeaeefc74032b4bf779c67d. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZFZ72059156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958013ef7eb67948935bc9b077d0b6e521452ebcebb1b6e0e0345418b247ac7e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:59:57Z), 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/QZRP42174421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9d44e306bcb2e96c0e715d33f446937664770d4d3c3fe370fdf6bedee60eab. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZRP42174422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756af3dff668a4dfcf1cdd6d8081208936dcce7bc3234baac03304efdcfaa558. 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/QZRP42174423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60f0ef02cb9ab9c4079d96e43e12fc5bd9ee97b39fdef03bc86bea5e449b90b. 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/QZRP42174424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0429adb3a6c4e8ad35a4f1f3b5d7d17395e62506519b9d2109fbdaff50281d3. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZRP42174425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6f24f5684270a96f394a4891c9828e6fa8486daaac580dc9564259df6fc421. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:08Z), 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/QZFYZ2290138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e852332ecc82770c341439d394fa6ecf83fb81561f09904469119988b4a7dd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2290144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fb5db34ad76e7720ea8594d2c97f0e4d6c4492671720a7517760ddfe823736. 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/QZES72264237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c58bfd1c1b785859cbd79ed3a6436b3c73fd21fd77d88c63393524a4778c58f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES72264238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a38416e3feba976fe2548a09b674ec9813e6169bb2a2d4c49276b220b74be9d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZES72264240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eee0b68c90ec60c6a80df0fba7d6d84232d854b58b4f35c64846d630e7bda13. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZES72264241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64af90a7b198f05d793f50e8f58b6b2477fc86d5d037020b61583380cfe92e88. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:11:49Z), 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/QZES72264243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c9ea741de77c236e80e85cf157f68d66c4e1c720b5820d71a6ae6da86705e5. 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/QZES72264244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafd91ff11dbe6d732a078c858155fa03fb5e91b7092def1e60e6a6fe0909146. 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/QZK6M2236177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9178b9d6ee9828a2d941bfb94f6653e72185655d7514324d4f4d51c3d8f6fb30. 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/QZK6M2236181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc678aa6b3956569bb1725a8b4431b3b2f45bbae0614c2a20cd1d5d2c8a4c74a8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:58:22Z), 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/QZK6M2236182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f835c2801b948477d1283484cd188bef9204c7ebd151c762782682294f1ef04. 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/QZK6M2236183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff8031b6892c4369120f94b43bb482ecc44ed3a028c12533c43d2108ba8aad0. 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/QZK6M2236185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4228c44a7fcfbc1c1bddfe80daecb988fd143ba0bec171c2305f4e04335ffe. 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/QZNWW2279365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5298c241568fc394dd929ed6137cb4ad1f7f729ed8e0f6c18c1b7a60a81b9af7. 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/QZNWW2279367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8183ad92eab6b0e7ac8b64e478d1d658b7c5add9cb3db3ea714447970ffcfa. 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/QZNWW2279368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeca2ffb1026db4803e7ca2ea309496368cee8f30ec9f5675e7ca301ea636044. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:04:46Z), 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/QZPLS2383912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5e86ac95cc86cda55dccd5a625cd2334ff97894211de7208b92aafb55e6754. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZPLS2383913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdebe48a1de527a7bf751166501b9395b61248d809f4adcfef8db54f888fd9e. 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/QZPLS2383914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0405cacae91a5b44ebb6e2cf93068eb9f9df7549e63b2107fc656ee38c64cd20. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZPLS2383915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96bc9a2c14d72b653d146dcc00e5d05e89145af16886df19e19e89f61352423. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:33Z), 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/QZPLS2383917.