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 0xe0ddd5db8ffddb6aa0c3c8c6c3a5694d757c67180723ecd685c947a9fe305749. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a951267b-e9d0-425c-88d2-2b9f4fd5945a.json and https://artists.proofprofile.net/proofs/artist/a951267b-e9d0-425c-88d2-2b9f4fd5945a.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 0xd6a5fd97f73a3600f6de20703dc0903c9d528ec82b82c3b784dc0b01d4efbd4e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USX5G0014503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d8d3955573d98d2e2b765cd0da324bc0f4ce40820655a2d78622d78f2275c5. 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/USX5G0014505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb114655d9fddb870d75455d65b52f65c265c86895ab055f1f8ad24f1b8e2a52a. 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/USX5G0014507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da4b78fe28012ea55eb5e89e81d3df7b98398dd6e6ffcbf7bca34d5a0b3f4d2. 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/USX5G0014511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aeec29b657a7548281a50828c5861cca32958618583f501a0b6fe17de73725. 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/USX5G0014513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862257bd081f60dfaa3c0b86d2965dc4a533e08599c0f6d145a5667e47963833. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USX5G0014518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcd2d7d97af65165f68800e7b7caa211f693342c17abc46245b353fee970b39. 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/USX5G0014501.
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 0xe8c167de09ceea4316f1946619fdc20682840f1bca6989399deda24b2e25bfed. 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/USX5G0014502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e9b2e7cde9d22b564a57c6ab9676fffe1a553853d48f42d94f967845fbbd25. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USX5G0014504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35233d1d5cd2af3bbee8830ec0cebc39e29dac3833b190dc2e3408711e0677e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USX5G0014506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91efeaa2912301cd99d322ecd8d95a1f0f5fd7c847acca0593a6e89ec076419e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USX5G0014510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bb11e04642decfe267d9215edf00e184007e7c6662ef6ee1e58821c3473f96. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USX5G0014512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa078ab1554ab19bf54245d6e524e866d2ed2d3bbbb8763dc9e9f00f748392d3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USX5G0014515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1623807091a0dcc4cc2b1f69b3a5c2f9f205234df25cebc3580e14f61fd82e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USX5G0014517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce966d8c33d07dfd4c00af8dbc94b13cb963c052b138c4c941a7e5ddf929b96. 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/USX5G0014521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401dc6119779246752dd87157c877e53088fb6703ac991b19be55e62c34a27d8. 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/USX5G9612501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb99afe7c05c3fabed1ad0f7765ecdbe4120861f2de820d1555bdb66ed26d65. 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/USX5G9612502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b7ecf86123e345c80b28bf2456fb22d2df592c484efef0e9691946af6a1250. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USX5G9612503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f538d1a08d0a4bf19f5784b9bc17e26458ee3e595cb736d308a26a3d83b9d0. 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/USX5G9612504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369f896345639f75c53a7be57bf9a5e77b6f46825a158de1e36e56060b259d53. 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/USX5G9612507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f17b3dfc5afdeab5243736aad33692705a379c3130987592e7503c976522988. 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/USX5G9612508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da859649927e9bb66e97c7b17924aec09f330f06f4806b3044b07cd58caae25. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USX5G9612510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb636ddbb97b99cde1723da9b138e1d7526308d0b973f136eada71d2dd49aec. 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/USX5G9612511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912b18f7dfa9e1f495886ec7fc95a927efe38593bebe5dd2d9dada7ff2644331. 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/USX5G9612512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b74b65c3b35ee1c9e3e5b77eab65cc4f92dd79a56ac3b1ad9a151cff3ffd99. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USX5G9612505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c67c2d28d015c984a59a2514c4bf14b39a464c5f60d1def023162a6008b6228. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USX5G9612506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebc611f28c702146cb1b625152578cc6f2d71d525fff41445617db02975ad85. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USX5G9612509.