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 0x579a26c2b517664e5647e4ce07ef33af8879c7560638dab453839bc1043f04b5. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6b34e19-8d12-4f9b-9e03-df0ad3b7b4a4.json and https://artists.proofprofile.net/proofs/artist/e6b34e19-8d12-4f9b-9e03-df0ad3b7b4a4.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 0xda3f5c57c8b1dfb5afc60c989941363ad495cc27e3a427c5312290353040d24a. 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/JPI102002010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff715cbef08a14d90107d40e56a956d9c472b0d62a5743a9462f24d1e35e0f76. 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/JPI102100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d485597f34d3458e4565dfb6ab1c3d808062ecd60f433fcc18f37b767d2f849. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/JPI102100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09394b3d847482ce459b2ad6565897f577f59438a969d7f137ac64d3567d7bec. 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/JPI102100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a4c20e273ccde5b3d68be4e41b6c0e4722cc5a9e78565db266a0feaf14e56e. 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/JPI102100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4509f627dc32ef15419a85dd882e548239bec1aa378ceb1cc709d1d8754f43. 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/JPI102100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11e86c8a8b261e096a4b54b4e9e9a3cf955801a818efd1796ec1198831c9f56. 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/JPI102400863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c310c63dbec63a310b25c1c062823e7b62c2bce7bb4e90db79b77899e20755. 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/JPI102302348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35882716c4ed22a63e68acdf153f9e57f16a11cf516b501c1457ce18239cb06a. 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/JPI102400864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc449aeb5a976986b7aee6d8daf4473452b91f1db30eb7d3d20ef45a4140998b1. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/JPI102300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c6a00acc45e45fee946d914623a409afce9d2e36de4e9123e4aa9a402d1649. 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/JPI102301015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaaf8ba36ea9937caa980c0cebe6ae53b6b710da25037e0ba7a83b085577e909. 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/JPI102201704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658e97c09cae6e3adc8c1698d341b222657c2f0b522b484c080fa92385e39211. 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/JPI102201705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d485597f34d3458e4565dfb6ab1c3d808062ecd60f433fcc18f37b767d2f849. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPI102100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3f5c57c8b1dfb5afc60c989941363ad495cc27e3a427c5312290353040d24a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPI102002010.
うたってあそんで！たかしのキラキラソング2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1abc3f0692d2467ff2570ddb36fda7633c73baaf7a1da55efa3a6fbac164c01. 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/JPCO02215200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fca011d9402e0604d8b49ef3c0b93d52bd7671bc4ea35d7995e8bd83a5b3387. 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/JPCO02215010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2a535d9d33f6bcf0cf775e4af14817c764cbbf540dd17b1408602897b140a8. 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/JPCO02206780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5b2d0e4145184028258157302264b6c3f274457021ae2c883c36f63aa3f733. 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/JPCO01927250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f4e9169258502ea22940380dab8626408102f8c79bf727f43d3ba6ba43c1f0. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/JPCO02222080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead7090cdacdf0a4407cdf8d3db2ae1b634100ce9d98816939754e81789a8fb3. 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/JPCO02215030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781044c29bc04af51fa0f4b7d1af693c20d222db12257a19d582d607a8b6ca10. 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/JPCO02100760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e01a6abfa41c2e936a7f1c3e1d51c71dd3ba3f1a77bca0b54021c8b0e60ef79. 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/JPCO02014930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32be1a26cbbbccc6907b7473a05cac2158b5514c762bcf490b414502783ef984. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JPCO02012620.