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 0x03ae1c408708ebe026d6bc6ba9a24dcb792062930bd1eea723a3561c457af861. 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/aab17b41-cf58-4b34-970f-9c8b6d6d31e3.json and https://artists.proofprofile.net/proofs/artist/aab17b41-cf58-4b34-970f-9c8b6d6d31e3.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 0x7a64f9d8fbfafeb5f95572faaa5ceef90a6d8924c57fb03451c547d990cee1a0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/MMA031900322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32e51845c00711059dff0cdf67ea4c9609a59917d25c4b80c743388e7d007e6. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/MMA031900325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a5e2b117719b8bf9b5cfd9c6e4599044e33e1b32e733c409cbac9cfc19ae06. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MMA031900327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd220d732f878f9e5895a10daa99f7923e015f84b1b6acf84887a183d664c1ae. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/GBSMU5122505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb592138b441d6ed38a0097a585af811c534ef8d9cefff073e8397c9e847b85ad. 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/MMA031900331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec3bf92baadac6ec64ae2b3fdff30ffb37098f00e489b0e803a5dd3dc0714e5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/MMA031900332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ff60f1518cd5a77d5ada757614fc4303607aa4b1a4da911a22ef7e0b7bb78b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/MMA031900333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5e36a059f06a3485cb39e0fcb05fda8309bdd9bc365518095c6f3686af3639. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/MMA031900338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce16e6d091cfaf5b4eb4a9b88f3c364d6eca28404d583f3f3f2bcedbf868911. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MMA031900339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198a246e9a57eeeaea842168bf8869772d7347d88b35f4ab02912aa42bd7bd0a. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/MMA031900341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa283dc70019057406e21e79801614179b81358e3ba842075dbe0ad929c1a65a0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/MMA031900554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6cc5a149f9269a7b1e833a9b6a56bd624ef5941e7a1f7b12fffd4456863ba3. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TCAEH1987963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ee8f71f9457e2035b0137eaedbe4f3a92c588a23b6c3086c4e5d541594a5ae. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/MMA031902307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50723e50850078551e7e69a303e5b6e572640788c73519f6909917624080df2. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCAFE2031670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75085848069e48887d3f65fedf7da6fa6b3f83d8894fbc523ae09073be117aa5. 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/USCGJ2316234.