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 0x4b7440548ffa9bf94375e39d9334eb374549143224efec1e705671a9550f2f5d. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1888cf2b-1453-4acb-b535-6455f57ad3ee.json and https://artists.proofprofile.net/proofs/artist/1888cf2b-1453-4acb-b535-6455f57ad3ee.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 0xf9cb35bcdfeb50e7edf86bbee12c011bfa26aee3e33f46c56857d62b7e78ba36. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCJPZ2460998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782f7ccd40b4a2e5d3648cf4d1fb0dea6615cd2e7931f78f502883e0bec7ae52. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:02:23Z), 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/TCJPZ2460999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c464c6d1df25edce1ac213bd5a7679e9815949b2a0ba77a4d0b5ea7338b9b8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPZ2461000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac195cb354b92003a934ed920a30af08cc6e89218f6ea2d39d46792c5e8ea31e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPZ2461002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97713875ceab2e0b793b130b165c1e4c1c76b970a38fb5e225e74141d0281d14. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPZ2461003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6720458f3ef6a8871bc392009ccfaece7f5ec790a88cf75937b246e487bebd3d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPZ2461004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c759518d552e6056cb3f6e79d16c7bdecc67dc32941db41233f9c670a51b89. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPZ2461005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153e4d2fde06477253e56e616d7daa80cb583064712619b549cd25daf458f798. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPZ2461008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde67f947fbe30d2e4e9bf98de9d0a7a1f50c07483af6af4f35f368619d8bb580. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCJPZ2461010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaed71386cff74d3db515073de85aa985cee1f9e3fed8a384b0df074e5898a3f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPZ2461013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242caaf6a26f5e95a0a72edfe96ae76acde78e29c7a7e5dd6fe74383d718f870. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCJPZ2497057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72deb45111cce83acffe7c85dadc4fbd1e6bae5ffbbc25ff5d8cf731adcfc9e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPZ2497058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61369001e7fc9f2ea7bc252cb1a08adc859f85a4e7b351023377526c08d9c3dd. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCJPZ2497061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9a15d2c52d374bee0bc89ff8cf18ca18593f933cd55ede7a864284c8c127cd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPZ2497069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328770d022a4bd24e20ec608c0333c0b9b3f09762d2b2e1875c629f64e4eb06e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPZ2497070.
自分が何も知らないことを知ってる
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3e2a4230cc7e0a318b9a91fc500efbb8cda65767bb3a393a0b95e9c0faf36a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:20:24Z), 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/TCJPZ2497072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37b3d57275758fd6c9d97ce3c31c6ed9f24840441bcfff0372a74ed659f1937. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPZ2497073.