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 0x5d7237c7898167e67d4d2acc8d6ab43faf998d25ed98d249f73d46347c1f4cac. 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/68431da2-a30d-43eb-894e-c12cb0755dbf.json and https://artists.proofprofile.net/proofs/artist/68431da2-a30d-43eb-894e-c12cb0755dbf.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 0x4c06fa3a669cfdbfe2bfec7b8d786e35e7103df4fc4d2082539dab0de7af3c08. 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/USYBL2200636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ca4456f5bcf7bab3e1ae59182706aa01bbe05ccfe23dd92bcc26d011da3479. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USYBL2200631.
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 0x3521990ed9c916aac2cc323b640dc84554ecedc5628b184b62296f8a8f631385. 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/USYBL2100843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe156782f845816e7c0c20f462dbef0a453b2000c479a6fd3f310713e6477e730. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USYBL2100842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d47ff54e48aa3040f897cb5c4b3cff597c530da865dff25b92aa29e48eb1a2a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USYBL2100846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04647aa8e6f4ffff9431022cbe74314e2ce15da334574754b42810bf67812fda. 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/QZFYX2006147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac5a72b5290288f0d71d00e5cf499422c8041b9b526d79c36f137d116393fe4. 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/USYBL2400749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd764fce4198ac1c97fb59cb19261bd9bfa5905e8673cdf8a0a414db8e194c500. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USYBL2400745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ce595566839e123d06471db81a9ea7e202e140988c40902fd7cafb27a3874f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USYBL2400747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1b8aebdfc2bdee78d466301069f5b77a7dc000edb92c3cf08547cd2b13a8b1. 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/USYBL2300885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c4941ef579856aa597c3f73295e961f8acac98f554293add9d75d38276587e. 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/USYBL2300886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fca811095725c5c3fdc95e77f488949d38918ecc41325465791ef47db6bf3e. 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/USYBL2300888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dc4749638717526eb16f15915d70c363c2b554485ff5090043a8f9b6cef103. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USYBL2300887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7e87a81871587f97c0646c7726bea12fc08533f0692d7130e48ceddffdd03f. 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/NLYV52200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a258f1bdaf365b1cec19f426c50a6597072cf8a8e9c152374ec1f89c6f9b9d7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLYV51800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d8cdcc0dc1caf4e4fc577c48256cd7a288afac963396e9c9fb93ce1d77578e. 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/USYBL2200614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccadc9df5de096d8604c428b3e393af38d290cfd4894590cd6c67274e43c831. 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/USYBL2200618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544e8be42a58b1406b7a51ae3bd6f10c6982d2f99f263c430fcffd6eb9dd9330. 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/USYBL2101843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0871b9e2c119331a3ab10793dc98a6758a16e1eb0f57c9d505f17dd7cbb4bd86. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USYBL2101861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc49f01fdd225b96f6aa3327c304582b20234b230c43582cfec3a46ed7015890. 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/USYBL2101758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1ec51402949bca2dbf3598a3804ab2caf10ea6406798ce3a1566470699c191. 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/USYBL2001135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440737fdb7553f2402ecdd7ddd9bd7e0676a89884d457886128e9dce1e64ce8a. 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/USYBL2001138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4871cbfcd3e1f0a12b6ffacfaa7f4eb96b9c2d7939118eb0b079e47009a9b18. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USYBL2001136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165fa7ab432dec3893302d610821bd8215235c332b68264e5a4f4c24ddac2558. 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/QZDA62062844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64652319af85d3826712fb24717ac64a06e961bbc5ca904eeaff2f01af092e40. 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/QZDA62062845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2f8ae163be9f67d54beb84b8667862b9794b34dd47042b679d72e27454421d. 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/QZDA62062847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7fc3d89f686e8093e6c051691cce79c4983cb6030e7aa9a1cbe8bd6947f4e11. 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/QZDA62062849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f1d730da5f1e51bbb6c7f6ba81f01a42a92e05e459b9bc1530317f4268ef47. 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/US25X1089223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2e3814916993a0562549f2327b14316627d0d251a50b68acf3cf303f09c3d3. 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/US25X1089224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ed1222877f9b7e010a3913d9f8edc0b35e1216eab5f24ba7a07d9b545d1cf. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/US25X1089225.