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 0x210a6923bdeb96eb8d0d8da54b1a328ec6ee4279bb34eef28b5008dd7292f58f. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31838ef9-531a-41fb-8cc1-f4776d33a744.json and https://artists.proofprofile.net/proofs/artist/31838ef9-531a-41fb-8cc1-f4776d33a744.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Compassion/Beloved (From the Lost Chord)
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 0xe71827b022e5ef6d5333834fa229df8982bc9bbf03f83600cafc52f7f300eac5. 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/US94N0610020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb113e6870f4d483a7512b44fb61def85a1f42a4af8f561b80c5c35d4d871797. 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/US94N0610089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4951e265d6fc35dc2369b4ce33d4846ef6a43d99cc66bc64afa6b9e7339714. 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/US94N0610093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb403e8d4151d89d230dbf00780242e98eb4bcb7846b426eb66b47ae761513a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US94N0610096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb113e6870f4d483a7512b44fb61def85a1f42a4af8f561b80c5c35d4d871797. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/US94N0610089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6933b8d06b871429844c920814d3e07e380274c35d1b5893f03a7241dad4b77f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US94N0610086.
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 0xaacbe3b2157f68a3b9d3a965352904d17b28a5329ff824be1c8eb09c7dd90a7b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US94N0610087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd784d6ce264c4c66cdb300ac774e205cf91267561e2dd6e79cec1cc3d678f2f8. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/US94N0610088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2dfdd3865370e704e67567cefec1407eac2401f5a2321daca43d14da9929cc. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US94N0610090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ff054bbaaa19e5be3e21a9887a4b1e82dff703d5587187e6711b02ee2365b9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US94N0610091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5b7eac8a573194b74481d933c2c78316771be4dae2dfb7fec402cb81179214. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US94N0610092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2433649495fcf02fc961bbff78be08c1f5438a9230be07b1d78025cc501d3b. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/US94N0610094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcc18e52b4e026ceca4135a0744a49b20871cdf8e80c56db55cdb924ce08ece. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US94N0610095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74aefb1be04c9df3dcc62c6da0b87821748cc8b546b45d72d01fbe913685750. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/US94N0610098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f523c17012b659ac0144c03ee5c78a302c4f5b8b9c37fdc0a22a8fb91af08f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US94N0610099.