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 0xf559d97b88577113997c5793dfe63499df9bd603922a3dd8faf4bb87598271e6. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2be9ace9-ca24-4b2d-80ad-108b522feffa.json and https://artists.proofprofile.net/proofs/artist/2be9ace9-ca24-4b2d-80ad-108b522feffa.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 0xdc504e5d328dd8c4c37e5e7fe72812570fac58838654c333ef38074fdc5daec5. 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/BCWI92200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f8171345df195e35143e39de179025d8188399446df2c0175222188e7e69bd. 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/QZGLS2432498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c559fbc7e608f3abefdac4f2b23ee428a91f7d696f64f07978cd4e5d6c6ad3. 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/BKCE22200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22de7fcc8126a9fda21fc45df15d4cdf46471e935b3eb7f9246d49ae4b3a4955. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZW9L2325738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093f8acf719485ffed4728737aa6dd5a07cdfc9fc8c7da14aedd413632a48d7d. 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/QZW9L2325741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50583dcd0384c0397d809dec12df4715fb71a7dc715a7102bc2475a718dd305e. 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/QZNJV2141164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5856137d97e094f044ad877e158784cc2c51eeafcc542be3c03a458b7b163f. 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/QZNJW2269061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe841740a463fd2266566195f4f152c312279491537f92dc9fdb1acd819ab201c. 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/BCDVK2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eeb8098f921818f0625280ecd865325d57f22c28c8e1c839f5cbe496c864bb. 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/US3DF2298933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2420ab2c9752782cf30b45d202f825a2c8091be9a43ca8d69a3f4b547c683d. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BKCE22500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8612fb1c264c508fb436ab8092b2b0f6e2052260dc0932ae003185f62a4b1a27. 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/BKCE22500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c435fe5ee7075454397662c0981fe3eb4f75cde62448f069a63611f7290dc7. 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/BKCE22500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b1be43261f36b2e4683a7cab0b9ee0c47e28c6aeab4203ff329f72d0c8866c. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BKCE22500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4767c930f96f799bb49eb0267f867694f1fbb64280572fb6e01e04260b69b13b. 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/BKCE22500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7e91fc613c8928832e3670af68f8e43eb787723f5dc1c1e1e494a21874462. 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/BKCE22500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fae166e550f2cf3b15c1d2178d4554bc247f5b5d4012bad27e15bdbb38d539d. 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/BKCE22500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7577f067dba7b2ff6f83501d8e99aec125541411c810ea121cd4ea2d89b9b74. 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/BKCE22500009.
NÃO TEM PRAIA MAS TEM LAGO NO DISTRITO FEDERAL
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7330197ed5eb43b0dcaeee51ae77e96dc5ff76323ff845d153a7a441e0c0f26. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BKCE22500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cef50dd7c88527941b9c9e3c862047feff7b20babed0c3221aca7919ab3af3. 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/BKCE22500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e939a4fd64a9f765dd71267b80d5aec16cedd3533bfd778603354bc0c7c6c5. 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/BKCE22500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a2fa74ba5fe0fc8f4b87cdf1b70ee80c5d81231a7d708c07655066be634707. 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/BKCE22500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943ca56af4cc07c25aeb373060bd8da58ee7e4ab787c0d78dea817f6dd8a3c7a. 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/BKCE22500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3286d546d118b671ef5cbab32d6b94711c69bf505dfa495606f16518187fcabd. 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/BKCE22500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4237403963cc58f75a7c4a7c970f95e167a989f85548eb86a5bcc62e19e2e5. 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/QZTPX2421492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5248a033e8de9cd74d131e69bbe40efad4127fbe2bfac12f9ec697be72315fa1. 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/QZNJV2441607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3157fb2f5f5c5e317a2b84281b5164b3ee4a6e401efe71927244c49964e562b. 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/BX2VU2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e563cc3906d1a77284d9e613cf8f0f76c1287e35caa5f1aed1bf454289ef60a. 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/BXZGV2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a6fd63c8fb726f1d0df46bce64a119233d50c9a971aa9bcf6084d9b1423ac7. 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/BXZGV2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc792aeedbf70b2243ae00fe51ac8a190879ac331958fca4c395bc9c522123f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BX2VU2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e56c39310ff42b6a9a89550f15bbe5e10b21443eed9fee969ccb760a329ad4. 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/BX2VU2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08b6afe915bc0f7f29c57003d2af3425fc599f5f6cc870292fec1f9d826a6cf. 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/BXZGV2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e26808c07c285ca471e4c5461104ce8db77b76a731014f436b64d260ff1a6b. 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/BX2VU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf936a5d446b586825b177c01cad9d85ec3ec9dbb2136c38213711043a370f9b0. 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/BX2VU2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294d44d4180e4da3c659601b0604a0b661cee61a477688a58cedf1a72197e2a1. 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/QZNJX2418497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf070014fcfb2762c161a3b14a41b62bea80f7d900d1115f26cb9dc4e4bdc3dfc. 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/QZNJX2418498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ef2e0c7acd2a7a57bb899ffb31d2513165bb635815c4b42a58552e7b6885d3. 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/QZNJX2418499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbac680aceda3a25d18e065b1a7962d436f49cd962ed51fd85950b6aada4d93. 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/QZNJX2418500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c1b865cd36f968959ccda6ba93d679069b37b151a6fb9ca73e7ccaa918188d. 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/QZNJW2074955.