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 0x15b4af37e2d01c7c7aea770c7fd6e5d5c02f1ae76e6767329b66da0104f852e0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05fff63f-1129-4c31-b0c7-f7414156bea9.json and https://artists.proofprofile.net/proofs/artist/05fff63f-1129-4c31-b0c7-f7414156bea9.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 0x171a3d25a8e8af9c75a1028acbe8290bfa92952cc2c8762821bcfadce7da1f1d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEXQ81105829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34d185845facc4e30c9599057ebba80c306378be1d73eefbc7ed4280dfb7772. 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/DEXQ81105830.
Kapitel 1.3 & Kapitel 2.1 - Wenn das Licht gefriert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dde3241ec0693f158e44f8ee0f9e93b3eac6b1698657af5b79223fe82ffdec. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEXQ81105831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43e147771bcedd266465a373dce6b6ff99252fc1525b3c74ffacdbe30062b95. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEXQ81105832.
Kapitel 3.3 & Kapitel 4.1 - Wenn das Licht gefriert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dd45b053ee72ee4f6916626f39cf7f5924949d1da7ae61b50c06bc6df3f38b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEXQ81105835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc834ae6fb6046cf6276fb3ba99443c78f3993739bfb2406775b832911f39e393. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DEXQ81105836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3f05c46ae7d47c00ded51cd78bee88e01359952484542dcbc63419fdd286bb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEXQ81105840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314f67131e58577bc76a3af8163a636285d0d8b3baba6d27d99e61a33462564c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEXQ81105841.
Kapitel 6.4 & Kapitel 7.1 - Wenn das Licht gefriert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c919de732e18438da0c96329ba4edbee6e3b594285ff0947b96e1ca552ab581. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEXQ81105842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491b7508e880f5e7ba616c6834ddeab35c39846e92bec8ad5a22ba8fa7d486f0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEXQ81105843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724b0af85d36d6d20a57d49442286257781a8d3ad6a0158a0913290241dc3b0e. 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/DEXQ81105844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb051c299985728b551f7ffcdf85d9df1e5eb2258bf351347d2c1d6de632e258e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEXQ81105846.
Kapitel 7.6 & Kapitel 8.1 - Wenn das Licht gefriert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf560edb05faa045e2a3f545e0ebe23a5bbb207f9690d882d84259b1743082997. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEXQ81105847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc786f87c9b89d190b80cb8783b96549847915d44d6071306b9320b8103a0c71. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEXQ81105850.
Kapitel 8.6 & Kapitel 9.1 - Wenn das Licht gefriert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966be6bf4d7fb6bfaeddd43eeb5fd75d9bcbee39f19f64e9596a7179af45e301. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEXQ81105852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0813de8767f28639e7fb4056aabfea57baac2630407028f98199e6afc49b639f. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/DEXQ81105873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9c4bed607b29c6b4d6f1fbd71c9dd0245ef3550f26dee5ee27be131f3ce3a5. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEXQ81105886.
Kapitel 21.2 & Kapitel 22.1 - Wenn das Licht gefriert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b7e4fbaee03bd2de62a1ab0f4a5a7ef5e2b4874ba49d2ccadee0603b96d163. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEXQ81105888.
Kapitel 28.3 & Kapitel 29.1 - Wenn das Licht gefriert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3210e97d34d620f0997207761d5dfdc2a5601bb78e872dae702ede4354d31e4b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DEXQ81105906.
Kapitel 29.3 & Kapitel 30.1 - Wenn das Licht gefriert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdcfd1da6a4e8a40db466032a44611d1448b24fc5340fa6329daac33141edaf. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEXQ81105908.
Kapitel 32.3 & Kapitel 33.1 - Wenn das Licht gefriert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f6013ac6684f420dbd794886a393440bde0a53ed90ae22ee6ce0ce9d176a71. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DEXQ81105914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e08af1289c1e31bb8123b905235442955acebf9e3b206b4d29cc254ef5aff0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEXQ81105981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03215121a9e5fa795f034fe564f4eb969b60e60c3742ec21214d057d23fdcc2f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEXQ81105995.