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 0x87098f94b39f4a9ed02d1ed13e092ed468f4c1bc2f4979c1da980e7898b2cd9c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e2f5d0e-3be6-4ce7-97b5-523725b1101d.json and https://artists.proofprofile.net/proofs/artist/5e2f5d0e-3be6-4ce7-97b5-523725b1101d.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 0x16c71fc117669eb67a60b947c701a22f566e0959fb98fb3c6daa2da4f0fc4a69. 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/TWCC32320169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25928adb1eafead543f944536f2ed8910c04c840e252bf1d729232987f383df. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWCC32320171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928d152bffb33b5974588c31cab2fff42d57232234b4ecdadb6c428c615f662e. 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/TWCC32320172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565e5504a9b9fc1d0baaced0032cc14daf5c6d38fdf087b49322c844f5274dd4. 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/TWCC32320174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e0a41bad4fe3d774f878dfcd475fdc7ba24441f2a089723887a45bf004b3b8. 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/QZFZ22262762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a18bde02804d022b433be56cc8b27f4f1ffd18d68ae8a549176100ff6f0585b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ22262763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e2581e7dc1d05af67b1b59f6c8b6af77d3f348b5e601d40fac74a77042bfb7. 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/QZFZ22262764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75db652c5bac06e75fe11c6380b4cb1256aacc076e98f18067e378d46e021af9. 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/QZFZ22262765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976f39e98121a19ca14e1c3daa3e2962466d7cf76394d01aa260fa5dddfb1775. 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/QZFZ22262766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb806d9a069dc366ae47c94b734ae6191cae339ef20de53d70cb52b11c77115e. 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/QZFZ22262768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafa73f463c213ee0b65f83b65bc8b9bba470345cb9e5168690fe384e5b0b777. 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/QZFZ22262771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa582375f9aeda845cc5a7c28b3f71997f26b7743b96fd1d07a0999f51387bb12. 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/QZFZ22262772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfd38f5cbc50aed79f611e44af5d345c5a7c68c8bcea24e007f0c149eb553d8. 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/QZFZ22262774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17f4606fa0a1db6c6e7c122542083858280f2e5b630e2861105f906a09c8ce9. 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/QZFZ22262775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04625563be5aa36c4bea012ed07a40e1b1c90802b7eb4a4671c762a9be90b68. 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/TWCC32502953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579a4416ab2dc993097035307a67949bfe4a853d2e2800aa12844fd38aa9a883. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:17:08Z), 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/TWCC32421145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c473c07bd58d5162fff22d0238b0416e55aad082665e180168602936d7f234. 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/TWCC32415834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a912bb7b7d1b80f17e2a0356794ac1d815e8b71e75b5286d3f383e6ef45187. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:25:29Z), 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/TWCC32322163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df41ac1a9bc46cf0e8a8c1ed77289369301fece72c73a311a1ec9d300ae5751. 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/TWCC32310042.