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 0xe72d401c9d42895210e3d73894523e53b9dcdb8b4b143ba3bbb7544344257f8b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acfe4ea9-4a4e-4743-89a5-4a8d6ad64ce1.json and https://artists.proofprofile.net/proofs/artist/acfe4ea9-4a4e-4743-89a5-4a8d6ad64ce1.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 0xb69c71c7f996f535ab95a59475a792fdd2c97e7350e2164e1920dd0d9fe6d01c. 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/BX3E51900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdb7de45fe40ef8f86ea8c2b67c81e9b66be343ea0b83547d40a24cc8ae0f9d. 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/BX3E52300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ad66f769fcd1d83fa04bc906322cfb481146576170b56ff896a2b726879acc. 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/BX7MG2000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b467b13364165436ca7ab7703dd336c0c8f6a6a60705ffbda0067fde3c6fcf5. 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/BX7MG2000141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e53a7ec7ae79da91b5688a9300b1bafd59af0f647e6e1093c7c502e73fb6ccb. 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/BX7MG2000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a0a2451ab56c12cfcef2e3609598ea279313bd751c221c32b376648d9152e2. 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/BX7MG2100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540c5cb1fd9c7f2c67130ba789641e946f5f6586381305cbb9694075be56b5f1. 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/BX7MG2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb408a3fe9832812ffdd300c275930916cc32508bed1aefdea5b57e35daeaa04. 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/BX7MG2100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6164c273dac128bd53e24b44d3f33a4388a6cefbee0f0dc24ca16a26997428. 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/BX7MG2100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20690f19306bdc48d1fcd3ec590b3817eeabd7c67ecaaa7257ba053ed5f16d45. 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/BX3E51800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfba7789112b4319907b62a733e8f71d8ac0ae3b2b4053d25a4b51d43cd2bd31. 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/BXQAF2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bc3c6201fbf78998f4c26c8a9341ca57d5d0250533893f5c9d98d818087e36. 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/BX3E51900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ce4e2f5c30c07cb7d808c949febd1f707c89f1d17482a40dccc8aeee39da46. 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/BX3E51900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522f53eb3004e9103bebd96112aad18e245f02934fbb8f43e0efd83218c1b6f8. 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/BX3E51900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe0d23bb661068148cdbd4116c8c7c45be7e9faf9fe7810740f5badf1e4e2f0. 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/BX3E51900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa569d2e83264808b1019166983631cd8c30ae346e4cb5c424d13b2a60d2c351e. 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/BX3FX1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69c71c7f996f535ab95a59475a792fdd2c97e7350e2164e1920dd0d9fe6d01c. 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/BX3E51900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22279ebe6ac0607f5c5131dc85562b0f5f99bdc2f5b867951773d9939bca9719. 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/BX3E51900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db0058860711536c26ca0aa5ba25ceee8f58c9f62bf2875d8f544ca4d0608aa. 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/BX3E51900010.