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 0x1f0999115df597f4632af7ee4a9b568ce34f379469cbfe1a2989fa8b4a34f64c. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36064555-c46b-432c-8916-192a3f7310b8.json and https://artists.proofprofile.net/proofs/artist/36064555-c46b-432c-8916-192a3f7310b8.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 0xd8971cc9e3873bed699d90c194695e1c2ec05a989fe8118b5f78007b4f7f0f93. 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/PYC842404891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb15d0f6a427deba257eab2de51749cd810485b621cf6f881c71072f3f9f0055. 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/PYC842401757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7554eba4083e8d0f1933cde3c11476f1ca69e99ce0bb064567ca89c5cabeb34. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PYC842401755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637794c548238bd0789af0bde43762bfef57f60df12c6ca1326a3d89b873d984. 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/PYC842401756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21560284ec6aaf7ea1ff883489ea80d2455e6ae5cc0ba9af8cf88aa8e84ad36c. 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/PYC842400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75487daa0ae084146cd94667d0acec8fd2d677264e228ad788171017e54fbe37. 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/PYC842303821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5e92e1dde001edd4d57ce98aff05550d49ea0d14ccf6ffa5a2a72607e87654. 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/USCGJ2249534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aacc33d39fb9a7d2ab2f4a1b9578e0fe6a7744954bc354d69f3b942d8760432. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PYC842415511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0563561bb64fd60a1b689dab18fd09c382a3e5e50974f20b7915777e73e62211. 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/PYC842409861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ba5857fbec6da7ee2018bfac9cf79628ecd1baeaaeef38312808473ebb833e. 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/PYC842406463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624e07791e2cdc76079a6fbcc9c837afd7ba20062f96d890543c09aa628d2ec3. 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/PYC842403230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097c9cdeee164cc62958320cfc62b1344812f171d500f66fb54067a87d88e9a3. 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/PYC842401965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54329db10172877230a1b6d6bfcd1fc613d05c67a235e2c4b561e3ce29763bf3. 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/PYC842400475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba7c5c6f180023bca32b787fcabad8bb409402330d0143c18210a535a7e409b. 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/PYC842304738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5011323c56a80df4423777a2e03254c59a0660e42ede82f83d93536ed899c629. 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/PYC842303817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2c2178c4857570c7f0abe3e68a3def511fdb63203162cffa466ebe46d66fc8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PYC842303092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7b1121fef07d3e03fbd14628ca19668e6b38a1b936f8c11bae074475507769. 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/PYC842420486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d95320a8d31b8edb54c347f29adfb0561a505b8828e8fb1e8dc43577f4f430. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PYC842502705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11c792a2993dc41af173f0411bb2306bd41d49c669277cc649a0973ff06a8d2. 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/PYC842417687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8476775e876d9659e3948f806362e3fe91c07bc49d053817f98f5d10a7dc24. 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/PYC842417607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ccf46bdfa8f9d9f58c0a1efca5a565be988f6cb3b2b426c93ba036506c5fa6. 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/PYC842301900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279cd885146ad158cfdc3dd8cbe4ff8da8271c1feefe88d274d09fecd9204636. 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/PYC842406032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb7b715a3d732a9ee430c0db9090c591e1d1a7c504c776423e0457fb400d26c. 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/PYC842409862.
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 0xd7f2fbf48da7087ecb0dabf03a50f9028bd7910ce948565faf78100922743fb3. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/PYC842303074.