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 0xabeff18acb6809f79daba6bc0ba2c5e50d7273e16f2301d551f1fda89c0908c2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfb7649e-4c50-48bb-92b2-b4f2a93060dc.json and https://artists.proofprofile.net/proofs/artist/cfb7649e-4c50-48bb-92b2-b4f2a93060dc.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 0x85147ec7b87a493a9c37079b0b664c6139bae1f5c74208d7d021637c9aed45c2. 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/JPCO01222610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989804dc7435d0318565e49ae2fc006661ba00e8187f284501b07a4499dd4708. 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/TCJPE1614626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d6eaa2b0325ba2a948dedac10f0eb5adf0af5b59efe08e3bf09105a26e8998. 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/TCJPE1614629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efdfae3af848243d78c8b2710e33d833b72357a4d79eaffeef8fb808a27cc46. 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/TCJPE1614630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fc7098c0ba802a788d64ee0cdf0680303953c894089e5f691dd261ec2fa6c5. 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/TCJPE1614631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda8b4087464c86908dcf9878d5034be97122b5b5f80b8d94eddf2afeb29da1c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCJPE1614632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea3613ea0e39bbc5cc56bf91555f9aea3221a1bdaebc42cb5cad565d0f03ba4. 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/TCJPE1614634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6709eedc8be1e08dbe2fff34a4f16870b6d4dc78574033abcb4cbed2c8f8fda1. 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/TCJPE1614635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024aff7d0e659a71a129b9e43e0af66028516d68e683a0c7bbf45ca01e2cd889. 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/TCJPE1614637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d12d176e23d1e0b543595e231a15b0b2fd219814f8f436cf1668a002362854f. 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/TCJPE1614641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118b937bbf11c4de559344144f394c2f02a30d7890b0c43ccf54529b9d5e362f. 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/TCJPE1614642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed04cf2ba0fdc84ca1a29a3228b97bcbb17a04126a42dbed38666d897596f49. 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/TCJPE1614644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fd8824967dba475eec5231199d91c0c6379e5179f67adac87fe89ea3142519. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:56:31Z), 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/TCJPE1614647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd235ae7ed8c663695131b5502ad7aced32a16af4d99c6edd862f2b152f465b. 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/US23A1558551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb071a1a7918b0dd34c21e68565fccdfce56bdfc749ed1453f09b041beeb86c11. 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/US23A1558557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e05762beccba5592b1379207f13741151a444580c91e728847d93c308b02db8. 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/US23A1558552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ef5bedfd46a2604725bc670896fffc2d7aff50c4c37de9aaea3a22f4471ae9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US23A1558563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860193b7645edb1310db55b9bddf67eed38459f69f86a7cb8c72bd72e3031c17. 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/US23A1558555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7612835c13af07189ee1ad78858f677801f124f1762fa934a39cf6a6c3f9745. 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/US23A1558558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c71ff674d252a9bb038f6c0e6647da4dda512405751a88445fcf46f4002cf5. 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/US23A1558561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16372eaf3354c4658c70af3caf98a2cddf1f31f8170c9763df6e9afafe49ee93. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/US23A1558562.
Tokyo City Pop“Portrait”Produced by Kanako Hara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d4e1463f4440222b7da8f17b94291ba90888a378f95ea7a8294f5a91c48b2e. 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/JPZ922301434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ff22f17f608c650c2c438dbc2a55232e9e5db88787adf8d1f361852eda4f3a. 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/JPZ922301435.
ARK (Actions of Random Kindness) [feat. Nikiie]