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 0x91cf9fda1bd0fd8e840e39519bc4ed2c7dc21c01fc3346002a0bedddf8cc383a. 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/b7adab42-929d-497d-8475-c4a9bc0110f2.json and https://artists.proofprofile.net/proofs/artist/b7adab42-929d-497d-8475-c4a9bc0110f2.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 0x9212465e3a2742877219f09158bf74ecdf5d14b6eb8869fb7b7b7a865f2c92a0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZW9K2425028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ab37af3face81c6788771991d1f9a7902f5b95ce4e17942aa8592ce1f635ff. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZW9K2425029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11793c99e945a3ca5581dd1e5b2be68891cea4a018839ce5a8b96e770542b163. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:01Z), 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/QZW9K2425030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73d0373cc2a0dae330b226f5044a538284fc8fd0ab8fd4525af2233dcaee696. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZW9K2425031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1564be9cd3b33714697569d4e87f2aa894a9c40ce038989304e59fd6f78eed. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZW9K2425033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957ea5aecd2a8e425835baeb0d9643934e166a5eeed7be2fa212e7f067571ccd. 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/QZW9K2425034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e13fff108ecd4e52e5ec3c9d976f10528f76880fb93d7437d98e775054b58c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZW9K2425035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bccecc6af3863aba4f7712d4015b5ded73bbf0dd10d434e6becdaf4cc385a0. 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/QZNJV2528151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4479a995fbb870555d2669e14177812a8c77a5525958c632cf9e0ff561922a04. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNJV2528152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a74924a8e7d72d38ad45cc7e06cf5f74d82629f609d22d9d4548b27093d401a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJV2528153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbb902ab54c2e9e228b32d34e2aa077cb6ec78db66bae4e80699e82a2399589. 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/QZNJV2528154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4981c00b5ddfa4a20a72537a9cce97c5c388a815e166708697e795e6640b4cc. 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/QZGLS2429863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ea3915408d4ed09a1eb0f9493f6c673da855c2224b0b2765c3af3718a22929. 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/QZGLS2429864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e7d7ffbed5bce26c67f4a45c91972472eaa832baafc076d6af3e9d320d95c8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:21:33Z), 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/QZGLS2429865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f71c044d820f88d86d6308af15749b76d2404b63c1342bcaf6d253c6155d41f. 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/QZGLS2429866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef39006845ee9338af07374124dd6f704acc587d38ab1484c5deec30ac6e281. 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/QZGLS2429867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578bde67c6381a101208beb2a979ece364820102e18c0b93604de18891a8bc6f. 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/QZGLS2429868.