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 0xa0092ac38c6400169c4c5c37098e7db7d45761d32cc1b5d8dee040abc783cf05. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee328bb5-128c-4a8a-9976-392a62f68229.json and https://artists.proofprofile.net/proofs/artist/ee328bb5-128c-4a8a-9976-392a62f68229.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
DÄNs Kindermusikwelt, Vol. 1 - Dän singt ganz neue Kinderlieder a cappella
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 0x770cfa964d18c9de0da62e3c26198d792e1c70e5b34e168c8256ade8fc27d2db. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/DEOX42001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084b1f09e6c6cf2423020218013c54da18ce2a900496e38adf6c2524d2cc2d2c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEOX42001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895242560e28864d85b0d3336fe68132a72a7f3e76dd617c24a39b34b4a46ca9. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DEOX42001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e4c1ddd322a1da488d58a5b43871f576123b7578e92a96cf4be7f7e1febd8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/DEOX42001005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22913ee914fe229fde81b7b948f6db3f9ac6568d7971f8295a8e39635522d68. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEOX42101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d0d5f813eef8770a5d0c108648885499f685edb7e626f0993d6e8156575e33. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEOX42401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120012e4106c90aa17477f1224d835df1bce08bfe1723713dae884582b62d7c6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEOX42401004.
DÄNs Kindermusikwelt, Vol. 2 Dän singt seine allerneusten Kinderlieder a cappella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d0d5f813eef8770a5d0c108648885499f685edb7e626f0993d6e8156575e33. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEOX42401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db64f6705bd8e36b3de9c0fb5187af0c27f98a0858c61870459d128e86c2fc4. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEOX42401015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120012e4106c90aa17477f1224d835df1bce08bfe1723713dae884582b62d7c6. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEOX42401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22913ee914fe229fde81b7b948f6db3f9ac6568d7971f8295a8e39635522d68. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEOX42101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b108b7cdea753ac1ae2c8e076409d0e8c9cd8c5f0a47f8f7fea4082e35254f9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEOX42501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b5bcbdbd0b1069b2724ba98fbd5b6cee8f92b3df82b657231f9c8688c46ce4. 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/DEOX42501002.