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 0x4ddc7c614ee472053939642ad4363038bfaff5e0ba074e75b482b55ee395eaa8. 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/572fb523-1297-44df-a740-2c90d0e92293.json and https://artists.proofprofile.net/proofs/artist/572fb523-1297-44df-a740-2c90d0e92293.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 0xf62fae6d48d302dec7692d455332506624553d371d522a217ff232f8c15a50eb. 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/QZWDE2400373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6aa470353ba2fb1b2f704dfee96057541eaaa30dff77baca6c28e8eea689a1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDE2394727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d99887d574d3b8752e5a83cc715d9c73bbe73616b4ae806a1fad907f91afb9d. 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/QZWDD2339224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501bf41b531cd152c433e53f237432bcc17bc00a5f533a8e90576363af65121e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZQAY2201363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6272c6a0d1c61688c0160b7d0ad813dd9074b20ab4cd26394f3de77a68a5a1d2. 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/QZS7J2188463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1cdc75305866f645cf6db09a21030998520b661f11fcb169d4f5b43599845. 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/TCAFJ2169308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a66fa464db83da38a4a8bd2b4244bb77069b66b68fa50ea32b71c4f0e3858d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZHN71932526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b5a3956dc5201f4996e96494abd6cf24586459b28353137e3eb6cd7bcebdea. 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/QZFYX1902907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fee7491ec7dc70a784c990f48bd5af628d8312d9d012910522fcd8be8a9ecf. 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/QZDA41900976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9462e475647617d4099d2398922b0e5db7f05dd782a2fc1d5ce31336448c27. 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/QZHN71932527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac373af0a0aec539f22bc85d6d7453a579484f31e6529e42d8e3c2b8813ab9ac. 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/QZHN71932528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8b4cb4fa875344a4d4017bf09ad0f2770eed677f5ce2c0b87c7c0acc0a90f4. 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/QZHN71932529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd853022a951001f7260794d4f79bc0c6c4e0b0d60c1c0137a125a8c66664e67. 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/QZHN71932531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefc5fdfef04a27646047cf1097ec12be1feef4d54e3e37b0b6f2c13c91563e9. 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/QZHN71932532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c3b15e30b3b1d0171782b502c04f485623822f290044fa2b07adbd4610b7f3. 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/QZHN41943154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe114b651bfc49a192891af9ee31ac7fc3c6e90db7885f7830def9b9ba3111be4. 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/QZHN41943155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf6a69baeaad6694848a4be1121b7c1b99a7f0b6e36e55329152eb8af748546. 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/QZHN41943156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9d89ffceeabb7fbc37f21763af11582f78679c7e6697cf8e576a9c55694daf. 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/QZHN41943157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25190c7d218131f5d244e76caed5c29491e49ffb66018c65c384e13b9c7258f. 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/QZHN41943158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe748198714cd79e71e11310ab5af66cd7d673711fa7836987b5e9202169c0b56. 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/QZDA42179826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa783ed1375f817cd544f177407b414ebc606f35c32fbe16590ab779682c1cee5. 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/QZDA72033540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fee7491ec7dc70a784c990f48bd5af628d8312d9d012910522fcd8be8a9ecf. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZDA41900976.