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 0xb564b68ec9f9f55dadbe1d9d771970d49e31ac4785dfab96ada8064884f0aa24. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/003fb2ac-0387-4f9b-b7d2-c635ace1c11a.json and https://artists.proofprofile.net/proofs/artist/003fb2ac-0387-4f9b-b7d2-c635ace1c11a.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 0x2eb4c5795f1c687335d3c5264a21d09e1136b725f5d23dc0e809aca484e8796d. 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/QM3UY1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce5e9b043d1aa3ebb2c6c7db75c9c88f941b39b5af4c3fabf31b2e743e2e324. 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/QM3UY1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e2602671c55a44f837d4516ff5e2a91e4abe7023eb51f5334fbaf2b055680c. 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/QM3UY1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1d6363879790d7b02666a322241a43b952e349220fa1f5802fa15aba653d65. 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/QM3UY1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8450dab91eff1866f2b712d44892b5295291d4984da615b8396a927dbacc4863. 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/QM3UY1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904018973d7b705aa695203292be6df86f6e47ea665387e1fbb3f697947fceb2. 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/QM3UY1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7468d728b3c6dcbfb1ba3315faccebc43931fa622c490eded058be8ddf9e2a0. 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/QM3UY1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea73b4d89fd774b4415e22e4259ee216b39d66007667685bdf0671902dbe874d. 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/QM3UY1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3c2d06695aa9af41cb0ab84264d192e56f628fefab06201d0e0801334ccc69. 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/QM3UY1900002.
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 0xd764e92ef014510f3f07dc70ab8cd2ebfb21a9e2ed3428006979e23b21eef00e. 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/QZ7361801997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabe35d8118efe2411febdd00d3e7c8d6c271b287b35ef3ebe87d298f01b7352. 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/QZ7361801998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b2a746bec5e301b477e1d003b3550be7fa804523d4eff03bf57dbb6cf97460. 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/QZ7361802003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faa739c19ba04c99f6aff5a300a6303b7698ff5c9255e6db886e7a0002912b1. 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/QZ7361802004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb6343c4d11da83cbdf5d710441003735f224d2a67598396a2f2280182eb2aa. 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/QZ7361802007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840ce3d5412708b116e37df11201dcde89e460361ebe7bfd98b9a7954a6ce277. 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/QZ7361802008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4965fd40f35e376198c2784d6b857b0d2dce6b03e1625f8377671e0b8376f1. 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/QZ7361802009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c04f4b8e7bc8baaee7cc0c45fa503133033410246ecab07441cea220b0fa08. 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/VED049201058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dd35d8fb485984838bf05cf42a9edd77403fef275fa04211f8ede936b67cf9. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/VED049201062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7566ac71fb2c54aca6509e8c8028ad34051214b8ae4fbf80dc27caba67e73ffd. 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/QMFMG1520615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afc9d71b736133e9362f23da195ecf2ca8c3936e71a67a4fe8536b75e83f9be. 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/QMFMG1520623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359eecac876444d913e439d0feaf2bc15f4b3a1b05593c374b5b9b575ea73c4e. 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/VED040500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5728d758868565898f6b63ec23937fcf0421eede3bc73c78524add8a4dcaf7df. 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/VED049500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc6492e01b6f55c60f717852d819d664cc7bacd4c0f2baec3707cb3c0a17f51. 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/VED049201426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c04f4b8e7bc8baaee7cc0c45fa503133033410246ecab07441cea220b0fa08. 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/VED049201058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe6e43a848118297e8c0cdd4452fc0ce8adf7096bc609a4b20b1992be138460. 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/VED049201061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be88d98af612848797be6d812bca6d8639f760b484751f8d56c48aba6187385. 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/VED049201056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa130a48d6d6b2750b141754a7eb60180ea298ce53b07afa664c7d3fa1065c3f9. 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/VED049201430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f2e5fd39c9a7c079c511b727f8d9bfe9eb848e5ccc96b57d9a88f753e2346e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/VED049201427.