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 0x3467ec8e87b96eea02c40803a892c7235439c74eb20595eadbc112c67a2a7461. 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/d5cd8aa5-d381-4d76-aafe-feee1f85d88c.json and https://artists.proofprofile.net/proofs/artist/d5cd8aa5-d381-4d76-aafe-feee1f85d88c.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 0xa2c7e1c749e35d451c7fd70b0f3268a4fd9738b3bffb373dd9ee46a167bb0925. 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/CA5KR2314100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fc3568a87e7444df1fb668718e6a010d5504a621f5e3a5e40a29ee4eccce64. 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/CA5KR2472373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8c2460996eeddbaad684649edfad5f8e8da4f80ba387e8affb7b267ce3164e. 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/CA5KR2472374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d0c8831f9e8fb894ae0bccf1519e4fa67581b8bd24dc2f12bbbca2e66818d. 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/CA5KR2468102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034a57dd4c2f4ea892587ef6ee08448f7c2d3386169ad0a9ca865d9b3b49e692. 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/CA5KR2447390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3aeaf5b5ea4325b8548e2669215847f9e73f351cfe6593261d6dea6cdfbde41. 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/CA5KR2447391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8845f9ec399b73023de281b44a8d16542bff964f03c8308cb5c7ad2ad5a8c7. 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/CA5KR2374745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d33e5df624b5280ea1368670a87e1ba60fe99a91d38c219134647b2597264ce. 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/CA5KR2374746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9928853a6fb473c8ded2c891feceb98359e17f6a4898b2acb26321dda04142c4. 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/CA5KR2320078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fbe3420709074f1a626739ee7caa762399079582e6fbf3681cddcb5934c300. 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/CA5KR2320079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ff542c23a8e8b9d351e5c90c632ab2a7ebface57c6b8ced41afe75efbcb010. 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/CA5KR2282775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87422dcbfb52fcd0e2ad0db5c8ea913d1eccc10dd70cc9b26b0d35185a855707. 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/CA5KR2282776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4a070b72844aa2bd72669b74270e40fb120738c9de0fa74a5f7a813bbc8841. 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/CA5KR2282777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b1c04e2f7e6e2c2a3f64e9971b065f15f4a302fb025dea9abe2ecef1855e20. 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/CA5KR2284779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16a95d720d989153c55e25da31884d64eef96abbdd5cba5bfd1faeb9c0aedb3. 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/GBPWR2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edffac95c3e5a5df01583cd0b3a6bdf78d2c3f1c134c307e5fa0a975103aa32. 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/GBPWR2000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb77f70a03d2b65e26c7d44500c5bcfa5ce8ef109a74c7b7ab0098d4d05345ca. 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/GBPWR2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d41649bfe3680c6f79415a0857f4e1195d7026d1f7401cc9e573158cf1140b. 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/GBPWR1900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e69d46215bc98cc1b72949c6f8c98b3dd38c71ba6b69b65e323b4aa50cce16. 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/GBPWR1510118.