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 0x5da0ede54c58312b29313dc78f855080abf9ddc17cf49014649c7e818f63a86c. 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/06c4a9b6-6571-482e-87d6-c6aa6b23ab0c.json and https://artists.proofprofile.net/proofs/artist/06c4a9b6-6571-482e-87d6-c6aa6b23ab0c.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 0x881042605ea350bbb662dbe0d23198c644f2e660998c36e35fcd90c194983bb7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKABA9301901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ab4055c41fba3762147eeb45628b3b42bc2ee96ded86e31c5a2a325abfe0f8. 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/DKABA9302602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94eb7d15b821398d8c166dd052040e882a58699834efece3206d50402cd6d87. 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/DKABA9302603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df112dc91a676a61bb71b98ac46e75003c2f89ff20091aa40fa64edb43523d6. 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/DKABA9302607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a9b63968f7f1c54b41c37c31ebd736f1c7055e66a78c38e7483c6864d8209d. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/DKABA9302608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19951d528704a845b7721c290745a6a2a603500c20a6033e6ed4087985beab36. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:45:26Z), 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/DKABA9302601.
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 0x51185ed810283e44676f7c4e5dd5642d7791a8e5df6e83c8d9d45e5bbc8db9e8. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DKABA9302604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57223b5e71f65808f5e25d173adc7e1545526a34220f5de73265e19ec260a1f5. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DKABA9302605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7441f8a8b347673693861f4adee01f43c47847b821681462d468c731c93eac8b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DKABA9302606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1b22198602238f4b79385e1c302984ce5e03fa8f8c7c2806d109cf62a9f8f3. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/DKABA9302501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f05d72bd066c65d7009bc0314cbfa1639b29f10a00f488e07541eab8c641a6. 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/DKABA0601948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7139a2d95ca26d6fdfee56a36d2eefedfd2b480e6c9a9b80d361fdb037d87631. 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/DKABA0601949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9262680ca2fe22311ffead59a3b3e8f5d5afeeed36ec49a14642fdd79cc957b6. 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/DKABA0601951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2840ee31b758764a364e90f9e1f1f120f9805ec8f4b17d98f406a2eea391d56a. 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/DKABA9721308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3145dbe1f6f1f259ff8c0a23cedbeabb498cc929da570e3980f342fe5b3be00b. 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/DKABA9721304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247e1a0a6188595eed7665f8f13e15937421d8defbb0f8dec81c55c8dc262ffc. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:06:19Z), 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/DKABA0601953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae907b26b3c270fa5292408cb73a80e9f62e9b8475b3ed28264da938332d7edb. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:09:56Z), 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/DKABA0601954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa349ede38d1e56a15366e7bf26244f974b727ca74bf10e842eb81c3f732f570d. 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/DKABA0601952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9473f9b79c105bda749552c9055a218640452c65e5fa25917c6cd958a17772c4. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/DKABA0601955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c92d960fd33699169644e82bba7f18813a2aba01bc5787bc9875895ea536c6. 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/DKABA0601892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fde9e841851768c22e75657984e72857fafa749cd494f91f539cfea355d724. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DKABA0601893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd79607ce526ee98c63620e7f89178029606f515d9aa9b923ec0bf4e12d592da. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKABA0601894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0652d51378d6f11f709c18b3dfe18e6d5f8b2845bcd534af0d630a54a82140. 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/DKABA9721305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81540874973fc27f3ffcb64fec9931422f8845f8ace311f81c7b09a149608d8. 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/DKABA0601915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b8cf0779fd260a5f736213c649d2deba9a2a37bbed7d12adbda7e31c906e76. 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/DKABA0601917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc437378f939f742dd967a6c8a6482b83270ce6f630075a87121e0aa7bad68f0d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DKABA0601918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14d6910ffc27023748a3b9b2c42158e3ab8525c2760d100d320a492f27f8270. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DKABA0601919.