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 0x1234c56c434d356f3914cd34d52d51049ae01268f3c3737539879c5b9c8a32e7. 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/f9b0d513-7a57-4fff-9f5b-1e89483be2e2.json and https://artists.proofprofile.net/proofs/artist/f9b0d513-7a57-4fff-9f5b-1e89483be2e2.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 0x3621eb1ca644bc0a13aec0b26ba6a401bd7082502416ff530d017d0e8b4bbcee. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USY282007942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4480d81007f0d012a2d1e30e6177a543340bc42e283c7f9d8d7687899aabce. 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/USY282007943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc482151a68cdf21c91187921199192310ad54c9096cfed9925631663ee0e9fe. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USY282007944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3f086faa8e24bbe37f16cf6c6bad5ae5de0570de41aeb656184fbc5bda9dc9. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USY282007945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0202b8874c30366e5faf463a30a57dd08b054a5792aa6037a0450df0ddf11f51. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USY282007946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cde1bcab57f9eced045e668904ac218e27dfbb682a6d7e2509f7ca9402097d. 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/USY282007947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb581973910cc7b4dde561409d2c67b249a3680cf32213df27d760a2072c155. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USY282007948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e9e7d083da6b024a1dbfb69427f5eb5a0a7b41fa08aaf067c571f763690973. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DES562311178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd35bdc4c62b15271c5a7880a55ceaa6739bf800a59dc721122a112c9e94bcc. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DES562311179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c88e445fb413af34f2bd6f30b8bdca362b8741e8b8c3cf784414c00dec18ef. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DES562311180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2184bff63cca95a46ef4fc24ffc8dbb8bf9f2e2153de3f069554bd8956c875d7. 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/DES562311181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bd79d2413eeeaf69fde45751b4cda58f70024b10fbed04030dd524df8660f2. 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/DES562311182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9dbd11a0200f017e08b424f3adc7a37efb15ca96a52c4824d747ea9da80b31. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DES562311183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2157f5033bda166aec57ac31b630df79204b1bf58e92324f8afb98993a9b6f4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DES562311184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a0905d4d0ad3abc14acf2c74bce854b41ae2c54b256c1f6999b7ca82e8f6d9. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DES562311185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fd2e277b8a9c25ecbac4cfda744498e9490d25a0e9c47cbd70a59a635423fc. 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/DES562311186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3385c498787d81b8361211cd4f92e3b937e100b7525e12ad5d4c54613328dc78. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DES562511978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84749489996a616d60f33265650386feead671d7fd1967843c39fd5446e77a46. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/DES562511977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84749489996a616d60f33265650386feead671d7fd1967843c39fd5446e77a46. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DES562511977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3385c498787d81b8361211cd4f92e3b937e100b7525e12ad5d4c54613328dc78. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DES562511978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0465128fd44f366da0aa0bf5134561971fd98d9b81eb8323ba0b8f59762767. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/DES562511980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d1b8393ad2f5dddfa0f39b2e63263ffe8682a73022d2819b811d13ba0d3bc5. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DES562511981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eb23983e58448e8c49a0caa98c32bcdaae0c0e42a471ef83c88db457b4673b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DES562511982.