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 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 0xbbe718b289d1284c0a10f157594ddeaa2ebed8ed7d6e7675252fffab700340eb. 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/51b2767f-b7e4-4622-bc41-6b0180f8f630.json and https://artists.proofprofile.net/proofs/artist/51b2767f-b7e4-4622-bc41-6b0180f8f630.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 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 0xdcf1919244edf73db986f25d9d831bbb508b525965f281b50560524f152c94d9. 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/DKBR20500501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a09176599b9f4c2ca9a2c1e269d19afd25746c26f31256f44f63193ab117858. 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/DKBR20500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86ccf4fa381b6a37066c86ef442a049d574b933980a4964f9df608e41478c1b. 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/DKBR20500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068b1d94d7d13111772dcb0a4ed24800ac5bbc35574999d3a5ad1338ac98e994. 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/DKBR20500504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffdf8504a2edc78e2718881b2b298c324eb2412bd38eedd247fc52676b6b56d. 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/DKBR20500505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0366f0666ca3c146671c328b206f55095f676e62822a812b7b24b3e83e8e6588. 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/DKBR20500506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd649d63a61863d09b9b88310ae185040da0ab2918f77453958b9566ad615b6b1. 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/DKBR20500507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cc153c2a4c0eb298e11be555cfba38e56fd893e187ec4f1faedf11af89fdc2. 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/DKBR20500508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dace2819c44cf45a1fc24b39eeb353f1b707f88b17312467f2481d2011c2fc. 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/DKBR20500509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de6a60e1229234c14068608c8a22b7717e95bacc2a27ab2dcfd9dbee24d0fe8. 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/DKBR20500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf099cd0909d5067e1475decf2869d2475be3070a08754b93f5322096cc8c57d0. 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/DKBR20500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cb6e4b4b16b603928532f6309a71801db1de1395a93f60e96ed723aedd79bb. 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/DKBR20500512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb53c6257e67d4a63b2787722061e4191f0a22f16defb6cede832a548ca5e58f. 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/DKBR20500513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e6ebb0d32e2972fbf6a2282242399b0f7447b4b3828e0206e6759579d9f292. 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/DKBR20500514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9a7ec30797880ba9c984db36a6de8908a08cc2c50c7a5ec8a74c8b7666424a. 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/DKBR20500515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594bb21fedbb949f98365f41f1e34826069bdfe9747e932d6ae8e26552f9bc2a. 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/DKADG2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf715c772e9242cc8383c236d63afe518f561263fdad2d5d86d25bebb13d9eeff. 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/US38Y2434547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edac592e928eade5d17cd36992d0807352e01595c5bb733142f0db212af5570. 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/DKUM71200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06900939327d9413ad9eb02119ac20b0f094139cc6e78cd43c37250ea07baea7. 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/DKUM72000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3672834fbf78594cc893916f11de0780cf17b262516f86b659c83cd822386a46. 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/DK1U41400301.