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 0x0fcfc1cef4599bc583ead1dd7bf980a3fc2eabe3d71cd015f582ed5059799f59. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7eb18ec1-1d46-4b87-b072-8487ef6ef513.json and https://artists.proofprofile.net/proofs/artist/7eb18ec1-1d46-4b87-b072-8487ef6ef513.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 0xb74295a0d4c1e6a81d585c0e639168d4cdad2814c65c574eebd1e778f94032aa. 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/US83Z2126242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4d79b027bca02fd3993b6750f536d7a9ee4db6b301b1e2ce98e99fb0c6ebb5. 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/GB6LY1600483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f0b9758f8acd39d2f503ba08c41329a3eca2f34bf63027664169aad70b380d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US83Z2491128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531a8d8dd6cd5d3220d86ee033de838bc9eb494c34bd3b0c50b9c032fe9bbc6b. 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/US83Z2491127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749f5832e761d48e12169227df52b1c728390ca9ffb34ab95db7e28df20241b5. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ES35G1200924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5493034954b8c917203a28984bb17e0e381aa118621abce932536a2cee4f0467. 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/US83Z2310570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85bfb0b081d38c4481e2a22996e08d8044b221245a7ace6f0d5e48c30883b14. 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/ES35G1200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9955d9570e63846ac3fcf9a3f21484d6e11ff0afcc1809da71bf4e4e76be58f. 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/ES35G1200863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13251fe2fc3b47b782b5c2f0b07314c6da24495586338fb9ac80e2129229ff4. 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/ES35G1200861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48aa85a5cbc207543050a2c31bbb50c2b7a4f09d882fe64b8afd0c153a134604. 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/UKFHN2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2739dfaf80a616b6feea707f4d59c9c913154c45365c61299cdf8138a58b2b4. 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/UKFHN2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf4d21c56302ab0bb9025e346f87fe51d0952996fc4031517ad7a15b0491cb7. 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/GBKQU2289714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28211ab87942de8c4c5422360de8537cff4eb05503e6c15eb8c5820f0b9b916. 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/DEY472272098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124a41953ddff725bf084440716599284a71908c17a8b77bb8c6b8bf9288e6b4. 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/DEY472272099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8de3a8f28ce55ceb69dca239f1ac2652661dd1cb2415b20f5f02496e41c82bd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES35G1200741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdb5607543f74cf9e57a6d289aa05686c952b4460079e76e8622e473e41aad9. 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/DEKB71384383.
Schneeweiss 14: Presented by Oliver Koletzki
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7540b119ff922e30981a67780ac4b8238a94251cb450a4e5af188b2c85be83. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEXO32235893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc036ec742aa2457378d20b8485bc0556f5f0912c0962c4104036bf3909e79e88. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEXO32235894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f425461d708076a1c80d0c9d275a156178cdf524e12f298cfb20ce140bb193. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEXO32235895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa182e7a46f39531f0facbbc5f765d5981cb26efe6157bb8cb7487a079e79b0. 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/DEXO32235896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbcb286f782e04517c5c90bae42a3dfd18f79b87ab9e97f0ee55ed6ad9ea50c. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEXO32235897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b6e41d6f95fa8fe1c26f6c7c0bd36d5ac48c29efcad96f5b2a25446a4a1b24. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEXO32235898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166fbd2049c5810578e2a645cda166d7ea21fade2dd7c8f07d43811d0609049b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEXO32235899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fddb23120a59a703e8b7454b9b059717d3d5c582296e2af7af086bff71769e7. 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/DEXO32235900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba37dde10335f43d1ec0fe711b89e3100714ac7abf6a877aa97aaf3868fa684. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEXO32235901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffa8e021565c693d11a8e99c1a2b77f0ef00f498855105ce14f217eb68c81df. 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/DEXO32235902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881e486dcf52e04e43ef33320ce92c33ad898de97a5ea4f3853c7d4b4316793b. 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/DEXO32235903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9821591b9e93f394ab5f0c9f831577421f08b9a6a03be76664c31e88a18e1a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEXO32235904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dab8249c3de317870400a685c36405d141855d0e19ce66acbc731f5d6041bf. 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/DEXO32235905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1556d7fc606ae7486cfd11fb1dd3d3cc9e9dd65197d0022eddd112dc55a8379. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEXO32235906.