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 0x7871a57a6d2d56ec4dfd3e244e9347f13492314937c288ec42c7ab080d96886a. 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/99a81d70-8a5d-42e5-856f-2367825c03d0.json and https://artists.proofprofile.net/proofs/artist/99a81d70-8a5d-42e5-856f-2367825c03d0.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 0x046004e7786f4c21261a10780248671ec9280c6ce2e045e75ef5fadb319c6d3b. 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/IL1030400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca919cf8bd4d6047e8a0a7732755bb27b7295eff0e88731bc2be2de0c880b6d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IL1030600329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3678e3446d35271e04d16b9606a3ec1c647d445fc0b86e2858077f0aed13f87e. 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/IL1030600328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe642449a6c7bd7bda1e37f15db7e95502040302db2f5c3d551e12978c93403d8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/IL1030600327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdcc602234ae16a939978d0c5d4d07f5148f5130a441ea9a7f53db694ef288e. 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/IL1030600321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710d565b81a36f84268c793734f7ef0b4037d584995944f87adb70f8c80eee01. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/IL1030600330.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280bf29d45f979ab26472f1ba5c1be16a2d44b6f607b3e8e1c73e550f49651d7. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/IL1030600326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4858616c35815972c438ae811f0bd690a84ba122b12eb9c98299745997b712ff. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/IL1030600325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025153bb3a1414642fd4f65e0a3f130c7007f5f80b6d06cb47acc65ee4d47796. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/IL1030600324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff75e75015191e30d7bb3d3c08bd78e3eebf4d00bfe6bbc95bd979f00b5bc9d4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/IL1030600322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bff8ce1ceea4604064bfe37079c798edc8cc3210ae02e3e94d6e5c9dcc9bd8f. 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/IL4060701320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6253655f43dfcaeb8a5670598cf4b3a3a7553d0b19e8556171d85731cf56d2f9. 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/IL4060701321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1e9624e6d70e53d498c8e20967d72b1ae58343a8c73400b9acf925bd2a0061. 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/IL4060701322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba170c7baa52400f139b5460347c144cf2ceaaa50443fbad39a0da118c2acba4. 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/IL4060701323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b005ebc4acb5728d9b5a971eb770f9913d787b70a1a8c2265de52ee834a5fdc. 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/IL4060701328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6560514451a5d1dfe65db73005bfe6e0e3a73ee2bad6d9fd102bec5314a305d4. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/IL4060701326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a5f286e75bb81b8d81d1722c4c5ef3c4682e6a33434d34d89edd086a8f114. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/IL4060701329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccbfb6e31f7873708f04954abe304467ab79f7667b06054a60ad55d54ad2dee. 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/IL1030700448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14627717be9e94c0a6f5fbe1728e30af526378b7ee37cc0a04c156f84cb487c5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IL1030700449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc9d765e7008457f44b2ee96ba7a189a1a63b7a69f3d1b16d9f9027ed8676c7. 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/IL1030700450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73be86a0db91d010a7cd74abeb7fe14de30d979a38d42273d411806e44539db1. 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/IL1030700451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d7fb2b75362deb5a2ba4c03e25634fe5aa2fc45e52d82f02773a1315e2538e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IL1030700453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddc16f040fcae2101f261c04f2959d597643fca9f5e8c59a33cf5f432a00e07. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IL1030700455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf493c9edbc58b30bce991574b953864f4411b9ff7d8338d60ffccd249cc442. 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/IL1030700457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea064b846a75a65f11cefc726e235fdf5dec58f23ff738ce1a2d575871bcc96. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/IL1030700452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31608ea52bb19d640aa84da7ea1257e2ffd610b21e6fc704db206df33bb2b051. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/IL1030700454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7867dd2adafe8734cbd18356c94738003f91a715b2f23fe067990d02bcb1fdc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/IL1030700456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bd553da98f2e742e0684177a4a91f67cd223df1cae3e1947fb7ed1cfbdad57. 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/IL4060901301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74017bbaeba093961d492d896c920c73fd3b2133b4818d7a4200f364f89a5661. 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/IL4060901303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bc8014fc447587b883c02d49554b5017a651d775b05381678bfb0268ae4a61. 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/IL4060901304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189ed7f6f76df09b508b4c2e1cf89b4f456a0af1cb051f351c4ed47da65b5ff3. 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/IL4060901305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1d84ea9e808ddc397b4be274de045cf8b958ce6840fba4a16e2c13166c249f. 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/GBKQU2321364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98671f99ce3b7be0f6d3dd197cc6221a1216b205bcb3b417c82b64c2beb27fcf. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBKQU2321365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715c700c058c560c1475327b45f06e2050fcf92a0604a1df2602dd5f986c9fa8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P1102979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fb51e0a41b591fff9db6b9f749d5104b0bd10db954e5f43a35a1bde21abdc7. 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/USA2P2033381.