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 0x90372c81fc9849cb7e0a21e795f5066b777c8715fc941aa1e54c19ae5941a0dc. 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/dab75064-2ad5-4e4d-b547-ca7c07fe8a05.json and https://artists.proofprofile.net/proofs/artist/dab75064-2ad5-4e4d-b547-ca7c07fe8a05.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 0xe9a7e27d9e5b26736c354253e37ca611d15f51e2ba989e558a8a61caafdba770. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:03:01Z), 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/TCAIH2437610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1580c2621535dc70be74684ab36d2d7ea2914068d25e7c3d548a69bc81fba2. 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/TCAIH2437658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18686bf3c99df750adeecc7bb23ee4ccfdafb91fe2d972e7ca04ac5fb257f41a. 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/TCAII2437673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3063e4ea88113c6ba38ba735689b01bb4562dfce5b7f53b902f6ce6a0392485e. 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/TCADC1786872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cec92faa26038440996bfbe51b157ce013de074f37a7ba34a58d72ff843b0cd. 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/TCADC1786880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe857adddddf7b5851ff6c704c4b88b4ba076b78ae0b303f48f65d886c6e28973. 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/TCADC1786900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a65a13fb1b09700f15a6dbe2d5f91cd25857205d97d9baf56760243a93c909. 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/TCACP1605739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40331cd21fab0a108896d5319bb15c5bb159ec58ab1386f2c265e8113afa9832. 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/CA6E61100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023f5f828ae250c0dbe9746685c64ca1f5cb70e5c3981f9e6f5e94168d81b2a3. 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/CA6E61100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344774ef316578acf438ae524641cccb3637898ce93898c805bd74d72fd17b4e. 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/CA6E61100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfecea34bd42811a30e0ea7f870630d0c23dce05136db614aa84a2976b371905. 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/CA6E61100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7bdebddeac77372fb75472d5ceac28b06adb81d6a2af0e71cfaa0abeee2205. 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/CA6E61100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6331b0bf821df011b7413b3dc553cfe776acf46482f75ba9fb87a9343a8ffe. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/CA6E61100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65956918c137399d3ee9d448228549f4abaa3234968f840c8f38ef6a48c8d850. 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/CADC41104533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2866863fbaff86cc0c6778c63b50c63542af5c7807804830b9cf83c99fdf5ba4. 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/CADC41104534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd8d5e8943bd3fa5da09ec594ffcd0a686b780712dc5796497842047a4f89d3. 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/CADC41104535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77d3dfe644555f2212fba346cb130bc0edb829d07b5246ca6c31a152349fc7a. 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/CADC41104536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1234100f500c0be45a3d3ebd11d38b19121b1f4a38d364d11d31c3ab3cb2ff8d. 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/CADC41104539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbded43aab5ce5e3611e13aa796b6b9388d14491199d861aac79b0b676a32e36. 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/CADC41104540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881de933c45d6d050c2f43a506de4f66123622967517550b035471c4faeb7a15. 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/CADC41104541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826273fcac6090b8dfce59a7eb4fdca58d628566c6f7a081e8f4e3c1ec451ee0. 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/CADC41104543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bf737bfad3d381824c0c91523b29f8661566074853b94b5f9288447673b8e9. 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/CADC41104545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7741b59854bbfb23418d98ddfd99e9479d2f9831ddf3fb24f0d8ae34d1a2908. 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/TCAAW1127911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b2c744c268157d86e61a0bc7674b798750b2689f375fc65c3e9cf52c1e1651. 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/TCAAW1127912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942157d0889cc056c6ecf5d829b3753b9082ea74501ce6ac4d02636cd67ba099. 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/TCAIC2474690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3988e8d81e89e3ed8abcb799bcdbba3b1726bd6b96facab3fb8a8784511896. 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/TCAHA2312819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10259b32039d034767b190300d321c3bf38caa6a159c3534b1964913a369cdbb. 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/TCADB1719042.