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 0xa5bc4dd9374b8457bcc7e643c9e5d65aa6a8558ff28094b97b70c8e26d8b59c2. Chain 2 (Bitcoin): anchored in block 953938 (2026-06-16T11:35:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/204d016b-c2c2-499c-8b57-9fdacdd9905f.json and https://artists.proofprofile.net/proofs/artist/204d016b-c2c2-499c-8b57-9fdacdd9905f.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 0xa98f14d0369d293d9e1fafc3a1bcfe0fc26f24fedd165ebd47d2bc4a89315278. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USMH92370282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2160f6f6d690a91d3c4a7a6858b66e706ad84f664a4e1a34d322c36eee85fd56. 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/USMH92370283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878f633a7d8c8706b54e85b079a8bd02dc2e3883e9b0abe78794d17adfa65bec. 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/USMH92370284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086ed4dd791045e9ac027fd9ef47a5274f469f77420c276380c8566109697c2a. 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/USMH92370285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2930ca4f5bd4996d536d3d3f973b042e561f59c92ef3a38f1afc7fa8e16e53. 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/USMH92370286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fb4a7052ba872326dcc0fb40be2a04a92aac2b00532e35cc3ec896501d2d41. 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/USMH92370287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26587b4c04761903e1bbd06c16ac55780a5c54df3fd3bb9f179177b5f307dd6f. 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/USMH92370288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ded3ddd8a1f6bb9e1b7722d4acd22d8ffb15994b8cfb106045a44f06a70effa. 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/USMH92370289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6599ab821d352e9ef4546a013545d82df6cd28b1b5e86d47e52bd776a32985d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4Q2236061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5497b099b9fe24193d5bf2d5320f4ebd11dd98b5070fe516e7651c4a79ef1657. 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/US3X59407904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa5e3b9632c3d5babd2e31fdd73cebb6e91628722e64f7f93224f3ada0ec977. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/US3X59407906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16000a57f0afb3631e10d032d475d1aef80916a225975b0f9c0b5fc38e1209d. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/US3X59407901.
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 0x7cec856c1a33fd9428d7754deb00bae1533c13531ec742771dbc86ceaa8278c0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US3X59407902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609babc183e8d81b2c26b2b5a046e3ec7f6d9b2056935fd9fc906ad07379110c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US3X59407903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01039f16adeccab909ed69ecebd467479ddd4c6a13170785b616cc779dd1458b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US3X59407905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa0349a966e8513b95ed8da1ee7b4b443096f59db8f59400643b64877b4f74e. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/US3X59407907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a06200f5f6bdfbde3a507527d1ef368473548f5729b0b121c07fabc69d4bb8f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US3X59407908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a410d1e837e74fc9015ab665a6474ccdf196566a2be383f185e4958c376a396. 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/US3X59406201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e878bc17b05d4876017ea13a858238492c54f4bedd850ee27fa3c094c1499f2. 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/US3X59406203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50f3b4335797badcfec30728bf0e6b0181c19c4ec48fd89735dbee12f0a5553. 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/US3X59406202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29efd59563487d9af4d51574d8827620089b0f67744decf6a252db9f52620468. 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/US3X59406204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc67777493d4b34ea91e7cbe447598fba4dcaea49ee1c9725f1115cca4abd23d. 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/US3X59406206.