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 0x55105de7b4d5e38d99ee3fd7148fe12e6f49a0758dc7840e82bb708f3b273578. 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/c042b6c4-53da-49e3-845d-45da0bc2b7d5.json and https://artists.proofprofile.net/proofs/artist/c042b6c4-53da-49e3-845d-45da0bc2b7d5.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 0x691190310102afa2fbdcdc9614cdab7ee48e32a07906a21de63581c042987047. 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/GX53U2030511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6a4b95f976716f16a98676db9ab943c05191ff11e039b7be1ccd062c1855ae. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLFP2255833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7773a7d53ba442689b2d594929952436e10fd7b708602dcbf4444e5a8624d389. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:27:51Z), 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/UKXN22203927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc448a23b0e19f083577f6c4cbbb144b342de4fc39fff2067a0363c20421230ac. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/UKXN22246354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4779f6c63294fe2d82b9668757209dcea23f947262c7e3fe6dd0bbce47c90984. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:37:22Z), 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/GX53U2065038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f6ccfc7a1b0e620cd2eaf48d98f845fc1413accbaa34ea914d6756f6e9e517. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/GBLFP2358418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1af2c61e7816a5f8f4b5a704ba867854c24fae1aaebfaa06f4ab83761f4f29. 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/GBLFP2454281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f3ca9895eebb1841673aec3926ea41c96d5884815dd8aa8fa8a3a090f85b7f. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/UKXN22401588.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5a672e8cd633fed957465ff7bddbd79b8b2ef0dbee375174667cf8cf455fb4. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/UKXN22401587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29648dd91836bc323bc92f411da8f11abe6edad6aeaa1315ac0a76068e82bd9. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:04:52Z), 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/UKXN22401589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eda62b7fbb54d2354804d886f6b57c8e2a3969702c257cf4b4b5de7061c9ff. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKXN22401590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7fddf3c2c9fd7b249599d39bc5c080cdfb280af0ff876ca17a3db434bef205. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2379466.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bec8966002dc53545da383168bf881876a2676ff91ecf356b21638c972504b. 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/BCL662500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68075b8c07382ad50dbbb71ce23e7de19d3e957bc0d26a67d5e20e8a4a97163. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBLFP2523298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5b09133c4e910cc7841f6a575ed2fc64b4892ed159ea11be280426a006ca0a. 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/GX53U2631090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5815556a4ec199e9281b2fa48bdd6c99d74648e0f67e3816a06883afa176a6. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GX53U2630370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b01b8e94087ed6a39bd954ec74570c02b1b009c9d3d0daa7525ed30e8746293. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX53U2630368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9fb1373539d8153e9f05f68ebd78b5cdf1dc356c7e8b1c20336286ac00e7f6. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:28:12Z), 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/GX53U2630366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30aff17ffa0927499ea66c18c6e9fa043a1dd600bcaee1d74bc6c614582da55. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX53U2630369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399ad493b35f08f68f546a0eb8103b73037b6ff1d0e7ed942b54893f9ccc86c6. 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/BKP742400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d747ba6286a83a308f7af307597610ec198fed8246b57c46bb6b2ddac37e7e. 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/QZK6K2562149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc1d296275e67d9988d8d6cccff58ba97fb50cd48fab9c076be2284f72ad2f3. 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/BKP742500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47f9c2c7eaa9436bff5df4c0fce720479a140da4f4fe3afaec4c9cb906fe779. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BKP742500007.
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