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 0x5720c35b4d9a22505116d8a16a1ef73dab34ef45c02785a2a564478c306f8d20. 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/50da2eeb-bf91-4d47-a38c-a6bb415362ee.json and https://artists.proofprofile.net/proofs/artist/50da2eeb-bf91-4d47-a38c-a6bb415362ee.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 0x39b34ad7070ca57bd74d2755c928ab894446aa7cccea7b76928404da5b3ccb47. 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/UKX8M2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b022eafcac69d1909c8e54726593b9406b7453ed0f5f6125d5d5290bc86d3d. 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/UKX8M2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57241d1eb3843c9bea2f54024930303b060c70b2c9b428aded0a747ee7a9837. 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/UKX8M2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfed744443cafedb5fd04170b18514d6a604d3b5019c0bf0125cd5cd32ba39b. 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/UKX8M2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef432756eea4c023966168efeb82c58230db872de2266b93a6fe8fbcd9e6607. 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/UKX8M2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6036fe59485341a77b1cf18baff3cb6bb5639753fa65ba87a47a6f4be91ee5e4. 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/UKX8M2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8530cb7bf9c0ea6b33e5536124982d821d192367184e109449a5431a5e41f10b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKX8M2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa077a475e95e49907bbe0b6e03a684115021215a00733247518f5618134833c2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2B2400851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094d12b702ac03fa6d4b642da72ac421c3722a179c4d297fd24fd4fdbf4466bf. 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/USA2B2400847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0042d9446e6cd8696c1cbb095f886256b242b5a48fb47cd5a0c8aee24871e2. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USA2B2400849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453756c5d32d9d47b0fefaf40227f753c48176ec182e20917cbe5982df8da801. 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/USA2B2400845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0042d9446e6cd8696c1cbb095f886256b242b5a48fb47cd5a0c8aee24871e2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USA2B2400849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453756c5d32d9d47b0fefaf40227f753c48176ec182e20917cbe5982df8da801. 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/USA2B2400845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39113a18d0342ccef4538fa6203b3b8bc790cc8851c98de2525f9b3f910b3691. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA2B2208794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef432756eea4c023966168efeb82c58230db872de2266b93a6fe8fbcd9e6607. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKX8M2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cf99e7d8888dbd2c897719a1528108104758dd9aad74c5ba9076ef1e647ecf. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UKX8M2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1d1e7d323df395e293c0cf568a83f1eafe7a5503d9448c919581641cc60012. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKX8M2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978508ad490de6a46d4915aee720d10b640fa2746ffa9bc3fbfb622ddef5b9ee. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/UKX8M2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d517c70a76e9fd9f5adb569fc2a0e6eeb9a92caeb37c2a898a84f93b2d5029b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/UKX8M2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5a409458521229e9300ab5e1fea72814973ae7c86d87796bdff24264feb563. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKX8M2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d18c8e3d688c3ae8ea431131dd01cefe969583b9252d69ef37e9856f556eca. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/UKX8M2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cecc6b563b1598623902e1b47f31b32e73e6883081e3d2680795e91822a11d1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKQMC1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a9224c80bc89ba193bf3c26e78ba82225807a9df3a15e6894d4ab49de48066. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKQMC1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e86b254d09cb5fb3ea42d152a99c893c5d36426a7923730c03361badf868dd1. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UKQMC1900105.