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 0xcddea608598dfd2c89a76f7eb837652bf58cc636a3486b699f9a9c20d01c139e. 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/a5bbe956-4278-4fd7-920d-6fe816f85e9a.json and https://artists.proofprofile.net/proofs/artist/a5bbe956-4278-4fd7-920d-6fe816f85e9a.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 0x03b5176806cb1d073719a611aac18ee5f110e222dc3a44313410e39e61838531. 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/DEQ022007323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b5176806cb1d073719a611aac18ee5f110e222dc3a44313410e39e61838531. 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/DEQ022007323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcdfcc9a5896472e29af8dbf97dedd439175ddbcaf68ce511bbec245bb696d8. 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/DEQ022007324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b4b5d52ca548182a96de19b96c59c28e5dbead06aff1f1cb71c3e5f0968fbb. 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/CH7811932298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f21a13c782dccc6369e2a703e63574b6274a575316ae8f12cdc8d629b42dbd. 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/CH7811932299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0152d73370e2d7a0861a0569c8ba8e4cbeb7aa93d8e1458883349c534ace0d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH7811932300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fcbaf00dbac6d7981b8bba0a130582e699048bf9e4051bb5f9126185f1e051. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/CH7811932302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf974ec8b18dc22e34d8944a6ecfd1cd85e2e129144059eda7843a8c7b9616768. 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/CH0011900273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61125ae8c76d95eca9bca6057efa1c1c7411f0809ebaacce3fe590b91ca67a55. 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/CH7811932305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7635fe8768ce01d6a6563f09286c8e676201c2abe41acec764e5ab2d52fac48. 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/CH7811932307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25167fbafd43d640ae7aa95c93288e098dcade1f451340eeb1c47bbbc58d41b. 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/CH7811932309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85e63c9e16fc46627543150a3abfc3dc73e612a9dbdae92e69f09b7ae85951d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CH7811932310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dba4a6a1d8143fce00ab23dab3b50ec91eb8b5a1de2056b16f2e853e4f86f3. 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/CH7811932313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fcbaf00dbac6d7981b8bba0a130582e699048bf9e4051bb5f9126185f1e051. 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/CH7811932302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61125ae8c76d95eca9bca6057efa1c1c7411f0809ebaacce3fe590b91ca67a55. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH7811932305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b6e45be768fb2336e775ae6e8a2a65a48a4e17c9745ccd44fa86d97d0636d9. 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/CH7811929970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf974ec8b18dc22e34d8944a6ecfd1cd85e2e129144059eda7843a8c7b9616768. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CH0011900273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f25f96818357597166a34764a7dfb8dd444920afc0dd09bb08a5eb0b582a6c. 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/CH7811819055.