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 0x793831890f68fab74817da18e6d44fbfe1eae8a29dc3a5e341ee493e16cfa61a. 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/666aad22-74a9-4d8c-9565-ffee795c3a9e.json and https://artists.proofprofile.net/proofs/artist/666aad22-74a9-4d8c-9565-ffee795c3a9e.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 0x3c6d5ec6d6fdcb4b7f857b77012ae84babb470957ede49fe590708a13c4cd66e. 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/ARDBP1900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aa3760e885156c81a1e8430de0867f8046e8efa2a8309afa22e182c70a9ae9. 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/ARDBP1900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8deae1d58c5267a455f18296a6fa80b7e05c6ed28ecc88d958e596bc13d9828. 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/ARDBP1900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca04315baa6da3ca2b3e47873aec40d38eedc376236a6db6d6e197327b65163. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARDBP1900144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef004cd16c689469b8f8fad1cc61606321b84848daeef81beb2a786827a3f8c. 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/ARDBP1900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6060b7869b44d8af370e51e50d0b11e19f0f45880b48843656f7880c9db0aa5d. 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/ARDBP1900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9de555ced8fc4e946b8887d4fbeea1bb8e158a553406c7444598818c05cbed. 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/ARDBP1900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31df2246fec19d8dad6d87704243e864a04bbd7c2fb1e967bb471d634248ea3a. 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/GBSMU6691988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3a221ade552aa5339a3ae8838443fcb7b49615ec5230d03de093090dc8106b. 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/GBSMU6691989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5da57e445e439f56d4dec683f318db231b5480c1c9d215c347ef542d5f91e0e. 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/GBSMU6691990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bec1fe923201e1b9f162fe46f01ed8579b407f77e3c2172218d3c8f76c77dc5. 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/GBSMU6691991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd038e0273316488c59d367390d79fdfd82d581c5bac9210630dfc925934aa4dc. 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/GBSMU6691992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55f50488d3024a5877b69031704871151c0f79f1e88e93d558dac09d04d4494. 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/GBSMU6691993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4112dd2f53c0e65d59116b0d1c9db08d95a193e7ab48728a3a7962b065f4c6a4. 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/GBSMU6691994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ea393060879ab82c9b549ded01901739b553f6bae787e0849984a585cfe9c3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMFMG1447398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7350479259324d9fed4754cc7e83d7e4a1b3f8c6fda3ad4754a793eb1c9a3f57. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QMFMG1447402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9246cd414ba5b65dbef546de946b8afc4e05b91f07a3cab3481a1a741ef5f6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMFMG1447403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4077078031bc007a08801421efc7ca49a2a86924a8e4c1855a76021d7cad47d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QMFMG1447409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3566e39890c9f0253d478b59922b9e3847f30b34835582070968b42d6527ee. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMFMG1447410.