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 0x50f0164bf0bb16f7838d0af1ba60b2d7204165a6ee2c247786b43802d220c8c4. 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/61410dc1-ccfe-4d18-bf37-b162a07e716a.json and https://artists.proofprofile.net/proofs/artist/61410dc1-ccfe-4d18-bf37-b162a07e716a.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 0x36ea19f076947563327aa615132efa8510584f68cfbc85b6774df2011f618c63. 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/QM4TW2219896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98088600a27191cc45591d1e5a54e4eaee3a70b963d6f299b2b8fbc0adcaa549. 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/GBSMU8462483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd81bc17d70e5417241752901df0a81bda9c55f1e0d1368d8159fcdb00f1180. 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/NLBW52110022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4237572ee4ca4bda20e7140c8e0f3449ab444c5b37c67ec2d252f867025af202. 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/TCAFY2153540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d89313740ee20a6ebfc9b3401217ddaa0d8576db8a6df6f8eec5e83814e775. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYZ2190573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdecb1ceeedaee14d319eccc1ea1c979be3d3693b83b3e754c67aee0b9a1c907. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2401573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56940cce04456cd80dfd6a2ba84d06f79a7e2c4e3621da8db79f001c018f0ad9. 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/NLT2H2400440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f03b1d9c43879da411a03493c37b701908bb3689765dcd120e5986b40357ef. 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/GX4R52381004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d02d121eca7bf49f7340a539f10c121c4a1b4c5023f56179277e067358d083. 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/NLT2H2300714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedad95b24ed51a0596016c3e4c890a98e33736ec78e0bb20a83e9b7eea8841d6. 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/NLXV51300687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ab1faa7421ee993c90628b151ef4a66dbf0a1babdfa62bf148d7b89b5aa256. 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/DKD3Z2110082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5178db25ad0c175103410c848e31cc2f65ffc0f15efb3b36e7c08c9078ca77. 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/QZHNB2166362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dd1c26178397b5c3be60aa01a9801a9f2d9b47de70eee0a2ab4341fac141c8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6P42130098.