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 0x0fcfc1cef4599bc583ead1dd7bf980a3fc2eabe3d71cd015f582ed5059799f59. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74295a0d4c1e6a81d585c0e639168d4cdad2814c65c574eebd1e778f94032aa. 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/US83Z2126242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4d79b027bca02fd3993b6750f536d7a9ee4db6b301b1e2ce98e99fb0c6ebb5. 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/GB6LY1600483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85bfb0b081d38c4481e2a22996e08d8044b221245a7ace6f0d5e48c30883b14. 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/ES35G1200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9955d9570e63846ac3fcf9a3f21484d6e11ff0afcc1809da71bf4e4e76be58f. 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/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 957122 (2026-07-08T03:39:04Z), 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/UKFHN2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2739dfaf80a616b6feea707f4d59c9c913154c45365c61299cdf8138a58b2b4. 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/UKFHN2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28211ab87942de8c4c5422360de8537cff4eb05503e6c15eb8c5820f0b9b916. 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/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 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 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 957026 (2026-07-07T11:02:43Z), 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 0x4fddb23120a59a703e8b7454b9b059717d3d5c582296e2af7af086bff71769e7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEXO32235900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba37dde10335f43d1ec0fe711b89e3100714ac7abf6a877aa97aaf3868fa684. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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 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/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 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.