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 0x3f00c28019450036693a9c1bcaab1d86127f716eb1f8648fca8cd21932ac4568. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae46e7d5-0c01-46d6-a6e6-a8ea1e3c06f4.json and https://artists.proofprofile.net/proofs/artist/ae46e7d5-0c01-46d6-a6e6-a8ea1e3c06f4.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 0xa94c2561cdc72a81d2c628af842414d193bab291070024ca33241e0db252ffa8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL9KR2309188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e32341c9d72d56b3064560a34334ff0ac5b2fa7e6b2358e07c32a22a14ab674. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL9KR2309189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592e02e5c62ba502a36a855c76f739bdcbbb0bc2ef27a45fa67e9d780a7a180b. 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/NL9KR2309190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9536e1dd942902eee8e97664fffca806e30eeeac7316368dfba4e903d74d42a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NL9KR2309191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ab6cae32d38719f7c60dc37997d463aa61885969fa6872d8644ce1dacd1f4f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL9KR2309192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14505f1ab63535a6d8f5d57a8f90983993cb166c72993d4c5aa71bac64a910c0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NL9KR2309193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b25b2110495d34de854f91f7290ccac466783a66d2fcf076f928c12b3dc9d2. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/NL9KR2309194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2067fac9b14081bb4c9086b95a062a51b4f86ece6294d65cb14f171c1060d5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NL9KR2309195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028f51cbbe766540c0ed55d176e624bc2d5477518afc9a550a53cd738ee2c9d8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NL9KR2309196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc243cbebe99dc94383f78b4af104a33b01d3dd811841b52f364bf4780e019665. 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/NL9KR2309197.