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 0xda70888577837e70752434369cc761c3fd4179c01cac9300e16395c5770ccede. 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/66228e19-7f3b-48b5-94a0-16e1ec72d44e.json and https://artists.proofprofile.net/proofs/artist/66228e19-7f3b-48b5-94a0-16e1ec72d44e.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 0x54a602bdfa588ab1f01e3d926ef6c33e4acca6b4eee59807626281565d795289. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRE19900479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccca5c9c50d0c94c99e8a6f3d67dddc5e6f9ca653aee2e44622fdcae19b033d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRE19900480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9a6567d7950da2ce79648db2b3f5f0a66219bf1b0246ea6d5aa1359957d384. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRE18900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2542f6fcca75873ccac9b4f41190085426f87e3f257befdc2e86317cf41ce6. 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/USRE19900481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac8488dcaa17b95582286b281681588c05624c0e6dd3664c3245ee97d665b63. 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/USRE19900482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e303a41a94140b8e107d0f1764fe5a316c4c372e6dbc315ef498f1453c16ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRE18900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6dfe6456d1705cce192eb29444d7d0f60da27004aebbecadde616adbeab7c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRE19900483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbc2a748877bb07c6c89641c7b2fad949ac9b02b879b3add22ae9ee567a388b. 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/USRE19900484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cc2b772798ec8f138985794422f36b31e93dc58e04065a9af601f6c9e5ebee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USIR27900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4b9b5f70d89023516b7ab89045c78d3ecd70602425fbcb98aebd2940e8e519. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71505885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a1dee215e01e7f82a6cb3eecddf3300755195acd1deb1d650b87c5f910c7ec. 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/USIR27900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378730e1d624f2c7ca3ae3123103682114afeccb440ed7ad936f4b848f3ff577. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USIR27900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e7f59d45b6b33be077c09891550719d2c958e25387705f0f50195b2ab0e1d3. 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/USIR27900015.
There's A Moon In The Sky (Called The Moon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb8b6c60ea55b22b893e7f50afeae7ecfa450a78d92a57ab59e804efd04a9b2. 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/USIR27900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ff0507d6b4b197a0ad81e41dd1531844d5f21a1f9e51c219d4baa725cfd5d4. 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/USIR27900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f6a08045eaf0ee25b3db43fa2566fd03f0b6bcf26f0a286892dd7c19ee5bfa. 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/USIR27900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6dcdf97477ea1d7e9ec864e00c65c9a63e3b2a2c230c929927f968e8d4780e. 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/USIR27900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0da2eef00891743b05e1085fa3c1ff78ce34a43a80c1a81150b0bb7fb149209. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWB19901100.