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 0x9225a85cf1aee5c2e37a9f47b02053008b462a12a2454baacc183fe3a639d40f. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97a58f41-5032-476a-9637-5ababea2a87b.json and https://artists.proofprofile.net/proofs/artist/97a58f41-5032-476a-9637-5ababea2a87b.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 0x1e934087ec8e0b6752722cda5182187d6df14c1e6430b3e28b05e6e113373553. 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/TCAIX2497710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017aac063516598a7201c3ce0625a1c12654b09c39f89959670f5f56e130e4e2. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/TCAIX2497723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb75e700ab549bd4b0699ccbd377a0684dadeb3e21bd530360de3cbf2b19bab. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TCAIX2497729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9271b57910bf0999475e5427d38ee618faa985410a23af31fa5f6a82ddb01202. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAIX2497740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca035193eae661184a3b8cf9ab16f89d9a4939d3d4ccdd94b8148a581a1cd8d. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/TCAIX2497748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731bae29cab5ce8a9da66b4b2fbc286564da03f9b8de61019382d7d15eb04b08. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAIX2497759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3954a7d5cce676b0f8f717991de679441198ec77c676822df517782c42f224ed. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCAIX2497767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf008083e5f743bd5795afdc805e08fe72a68f6f6a34ec2f08359a7e6174c39be. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TCAHR2323685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeeb6643f1f9341a94c02016abaa03c8d43c980472ad3d184337b407cad37b5. 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/TCAHR2323739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecad2030aa5f6011600cd6b14a480a8032846987fc4f67a134837d41390c56ff. 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/TCAHR2323748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bea1834ccb02e8f65b60d19b42c68b9e1a66ee5faf66a77f47caec240e4fcd4. 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/TCAHR2323756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8041d051730aa1cc0f26bba6d718b6a0941e6a2a79ea4fbbd6244528c07cc9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAHR2323764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ce705f86715bd0dc0e584a19444211c0442670aaebe58a34422541d4271db3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAHR2323772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cce5ad8fffef3dbb6576868a03b152e4073d4f1a75758f78702664d2b65fd7c. 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/TCAHR2323777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1133a6df96b0c7b778efc39574642e79946af2f62529b9eda33af554ea22536. 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/TCAHR2323789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218573409c51d69579a89fe0f2091b44fc98590085540dcf71620e662868024a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCAHR2323796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1b4405475d164cc7c4142cb2d407b3adc7bdc5eb3c81da92466b321f8aa7ca. 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/TCAHR2323806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f14e632d8dc63afad5d880df7871714da2bc997b30db33d5b890a2a86511122. 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/TCAHR2323816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011e3dacf94e561677b8f73341a1730eae1a71f7cb09d2af1948867d5062d9e7. 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/TCAHR2323819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c41bb33e189df42f6b6c29dea0f46b080cfa035b376965ebe38eada9476a18. 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/TCAHR2323825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb42350b2ca13bfaa35029cb9ce9a077f1d018f1de8d4088f42c426c7aaad32. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCAHR2323829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051cfda52d65a5e1cfd4f6352f0b4a5783bf3a2f8a3555efe21071072171fc1a. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CH6542290235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2965e0ab0fb3ec284776161c960e508294431b9d5b075903139f8f52ea34680. 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/CH6542290237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93110cfe742c822e3068a56ff713cf09a7b59945a19ea268988ec028fadad682. 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/CH6542290233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf26133a95005c5b03a88ec22e273f1838f28fd5982da35ba5e711d4efe05985. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CH6542290234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0897f9a05cb8ef9d47c2fbef405d8fc9d3f3cc4965ef3fb09f120e1f2e08d7b2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CH6542290236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e9df9a4043609f78846ccb2bed70c9a2f4ebd691722eca111053524d51e8fc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH6542290241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c8bf6afc859cf873578a8bd1c80db40304b326f07acadc0fb45385eb7ec2da. 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/CH6542290248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa462b8b9b1bc779bf3ceb8c573a348bf4a19f30216eb3f32c43bf2e853e0752. 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/CH6542122156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320e4959b272d43bbe5e505fd3239ba54c4b450b1ab8ba2d643a116b2aa02f8f. 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/CH6542122157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ad8681ea6ea9d0821a52bce0abfcbab02ee52216897d5c1fe6929ac3eb9fa8. 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/CH6542122158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718c78d90d2caee62263772fcca665ce3289a83b5d186b7d8bff43c6221e7918. 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/CH6542122159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6babf06b3c3a5d1bb4edec671e4b3f6b395754f6e05fd860eb5fe7b31dbd82e0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH6542122171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82f621bd5d45fde5b78eff46376e80ebf4bb44f5c1ddc4f665224609aa925e9. 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/TCADU1854890.