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 0xbf705105e28a182a3bfdc6c0a91a6f11f6f01064c697bd03703832f93f7a30b3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64d9b1c8-c4a5-49f8-9a93-0d1712b97a0d.json and https://artists.proofprofile.net/proofs/artist/64d9b1c8-c4a5-49f8-9a93-0d1712b97a0d.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 0xba9f376917b63de96e07ed636d98f36b5d95a68c29a3b69252c6c785b482d386. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRUM71801158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3617dc852bcfd63f3e91ad43f78fa4bfeacf5bfa7dfdc0ecfeee0da501e6357. 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/FRUM71801162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cdca68956bf796c1694f9066816f3246d0ea63a72bfa9f0b978ac3c1db9b2a. 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/FRUM71801163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450fd54225899a5fb75a08dc0b1831ad3fad72c8937a9cadd63b38e2bb19ac52. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRUM71702241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dd15365fdf35922065eba6da4468959f0d66ab7da7eb70a6c050c54607f514. 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/FRUM71801157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d87f368cb5dd278ea4981b5af06864641917b53db86878d3612a465ce9eaa30. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/FRUM71801161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324154bca31b3b1b3e7741f9d7b3efb7c9b60c600a5375f997455d24c7bfa520. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRUM72000373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d540aede5bb40ad3d4b9c801d9db905b115915c1e2c3fb54cbb12922dd9e36. 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/FRUM72000448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62373fb06e8a8d802d920bf2eb122c4ac1c7cd9055d408378f04c2c7fd54aa12. 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/FRUM72000449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495bcc6515d64dbc7c931c19ef0c334b37bc79fc43f6fa6da56b5ec898e1a8fb. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/FRUM72000452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb181d7ccc62e5019468686d696dd46d1d259c38c31fb19d3c15aa6bdcca58f9f. 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/FRUM72302436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e541955ba91bd73d09992a3d40f1841e8ecc93b85f26edd2a08b83a64c6b3f. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FRUM72400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919a3817d0399d6365ab42ad5158a303f49b18687dce04c50800e3e597a5308e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FRUM72400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6104ce05adbece2e243f95a63f3e8be4dd1f732c7fe738afd47c214c7a4f6187. 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/FRUM72400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb181d7ccc62e5019468686d696dd46d1d259c38c31fb19d3c15aa6bdcca58f9f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRUM72302436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da2edd49e33a0b8fbb961b56059e68ae9d03f0ccaf1ad0d906b15a02e761773. 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/FRUM72400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8a890c486c1a7b3eb123990fd47e82d4f5e44be424c50dd886f39135c6e798. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRUM72401968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a39eadea1b009801467a8f075e1b99f5071b8868fc8c95500b237d017c0f12d. 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/FRUM72101305.