thumb|A marbled godwit being ringed for studies on bird migration Ornithology () is a branch of zoology dedicated to the study of birds. Several aspects of ornithology differ from related disciplines
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 0x306b1a5d2104f8b9e796bd546da92b793fa0ebeaebd0d1c824af9b87965b80f4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c554b171-8e82-4c1b-8607-fdbc226d0600.json and https://artists.proofprofile.net/proofs/artist/c554b171-8e82-4c1b-8607-fdbc226d0600.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 0xf4c1636365dc9387ca437bc5ada388c8ddf9e4002c7cd8f0c5b6cc12f8199179. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAN112301102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2621cb57a2005af7cadd8ec0c7e4662f3441d108eb998fb1435abe6314f262bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAN112300733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff59058f712f9d1f3594e29dfd93ddfe30ab3ea26f896e3a7f35503cc647646. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAN112301103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15620c816a3ae41e5d6ce6ae939a48c854a6f4ccc83cf909a6ae830d4e84040f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAN112301104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0fc06a6d31fa95792535a0793e2860722c39c0c4234b697c43230ec4600b3d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAN112300889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f0ae3a2e8458733ec42ffdd3b95bc8566470ce7a622723e0734708450f4021. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAN112300888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb194ba93613dbf52330bd164ac3b95ad1cf53c0591e322ae65575991b47d012b. 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/GBLV62108136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bbf1a01f09764fafbece607c1a644f6f8babc6f348679ed9b4ad721a9e29ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLV62108137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39cc75dd506ee85cc0e92db28863adfe50427f4ba9a47fc09f2c7cae78a4f00. 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/GBLV62108138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5495d6cf5b300772ab13e848a2145934063771c7fbdaa3192384161f9668635. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62108139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4df7dc086a4334fe0c0609515622ab58fa9e5596b4abedea51c2e230c3a994. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62108140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cf85a3179ed79d3f1b10a74c5875636f9fc83bb669af3ab1f66f5799ee1170. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62108141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806a115a425b936f792f17bfa2d46c59ed5452c7fcd39434757d6c4563d4c76d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62108142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4324c3f31aa65a78be10b33716b54c7da4f1fb2256ec7d6664ead981c53f8c4d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62108143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf752fb81e3edfd9ae6c9ff0f94fb84b2849195d6df04a4b4401b98eb26ba2d47. 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/GBLV62108144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5a07ef8ed66b3373fce22ffecb2fc76c081ecb3e92855993628a4b50a43ee4. 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/GBLV62108145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9693fce74b59940143214d6e84cd42230c6f06e897a9baa89f2411fce6814ab1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAN112400739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff01b74e246903cc78032431c541e6be33f7a65bf83ebb6a6c9d1a8e1ce8142. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CAN112400741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea868c930d7f5cd39be6b68548dd2e5c30c3c15bd478f43f5705b1ff24fc5c46. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAJ222400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69336ff408d6607b04b86b83f49530ef6cc5245852b50216185977525505061e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:51:17Z), 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/CAJ222300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7839ec98f76e9c4e9d4dcf0763476a8ed36b1adc707d9093ef4381c0d556b5f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAJ222300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f7978c1485628a5f9df0c0499d8d9f4983497901ef06ec348d68771b7279de. 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/CAN112302124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69336ff408d6607b04b86b83f49530ef6cc5245852b50216185977525505061e. 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/CAJ222300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc007c1f1ca52e689838991f9933685db1bbb8507a07055586fa31f31a92c9ad4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAN112301177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0fc06a6d31fa95792535a0793e2860722c39c0c4234b697c43230ec4600b3d. 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/CAN112300889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f0ae3a2e8458733ec42ffdd3b95bc8566470ce7a622723e0734708450f4021. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAN112300888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2621cb57a2005af7cadd8ec0c7e4662f3441d108eb998fb1435abe6314f262bf. 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/CAN112300733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4651e0ad19b01817bc5467cbf7864cf7ac7f59ca4aadfaeb23e76871d1f67b40. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAN112300445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557affd4543fd83bfe86653b48b4f227e814ab9c8aff4a6afa76617e9b2362e2. 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/CAN112300366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125b51c8eaa4c2af42617f6934bfe05515387e14849df0e3466093a019c30bd1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAN112300176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7839ec98f76e9c4e9d4dcf0763476a8ed36b1adc707d9093ef4381c0d556b5f. 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/CAJ222300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fd044efc19a659c8d935f3c6366b860e679a3a358637f6e29b72bffddd52b4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAN112201039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a63c3798c06aaee190c64d30f74c7cf6bc637b92fac379a2af5463ebc481bd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWX2289582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a63c3798c06aaee190c64d30f74c7cf6bc637b92fac379a2af5463ebc481bd. 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/QZNWX2289582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a2f73f919e49cf2778c29471a64117028da09ea2010d7cc064764f847b1916. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2253150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ddf7a75704ad60a674600f5b6f72c7db65dab9556a1b414085e00c25537f46. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2239007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb1c4156cfc504914aad84f7ad898849b0f3a18e67b20b899ee1a2b50f540d5. 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/US3DF2239006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f72708c9b003025c348c383622a3e7ed6c54492e0679f9ba040c5a4d9068db. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF2222257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f72708c9b003025c348c383622a3e7ed6c54492e0679f9ba040c5a4d9068db. 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/US3DF2222257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc886266b41ac90cccb776eec66b2938963fe41c46437afaa069855f3ea9479. 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/QZNWV2420361.