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 0xf04fde3c6e8514c99bc606a11796493dc6ea09fe79e30c903952515ab8e631ff. 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/f778a8d3-7298-42ab-a236-ca587d2495b6.json and https://artists.proofprofile.net/proofs/artist/f778a8d3-7298-42ab-a236-ca587d2495b6.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 0xcd17eaad7d26441fc23e6f97c7dbc82d23f1f7fa03bf41512882bd562d616a55. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR4GL1070255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa73bbd80a40871c09adf289f2a3a8bc8472f85b76f388fe23ae0d47478bfa7. 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/FR4GL1070257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6372b5f19f6539af8b4d7451bfa790c8bcc78751f01644640ec7729a74380d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FR4GL1070258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45561d5e06189cc09dcd4075e7cd2b94223b689eca0b9366a26109ecc919d79d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR4GL1070259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5624b9219fbb3209cc02878e8e280d5052c7880cc67643219fe0bf2fc0323f3. 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/FR4GL1070261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2e5b958b31e07fe825ba541f4ac8d287be0bc84a745da03957f193e2a85a02. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FR4GL1070264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31dc03cf301823d4cc7ba88578d53655201d24b7ef069c37331dc6a4c8bdfe2. 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/FR4GL1070265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5548c44b53f49a42217c8cd58ca312a573addb3224b27c2802977f2cce3f8e6a. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/FR4GL1070270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd63d12cbce6d9fd366b8c147a4cd3db5076ab0319aa2ddb037ae2ac39a89f1. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FR4GL1070271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1813b4cb453b323139333217e1f1fc34484daa5abe1df61390c1cd254df42a8. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/FR4GL1070272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe155d95de492aa04a333095f61ec8e543b3ba725a23a3d46884f3288ca72e621. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR4GL1070273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd17eaad7d26441fc23e6f97c7dbc82d23f1f7fa03bf41512882bd562d616a55. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR4GL1070255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6e2c8db4c985eed581d35c4f2b70d8ba092d40fb3bdba538cb6f8f73cafd35. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR4GL1070256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa73bbd80a40871c09adf289f2a3a8bc8472f85b76f388fe23ae0d47478bfa7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR4GL1070257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6372b5f19f6539af8b4d7451bfa790c8bcc78751f01644640ec7729a74380d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR4GL1070258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45561d5e06189cc09dcd4075e7cd2b94223b689eca0b9366a26109ecc919d79d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR4GL1070259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f48684cca4876c4adf96924d9f7d7af288c171d3f4f25d0e85ed2d53ee2e69b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR4GL1070260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5624b9219fbb3209cc02878e8e280d5052c7880cc67643219fe0bf2fc0323f3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/FR4GL1070261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8178b6153d874a24e619130713ffbdd3cfabc820cbe99cceafbd33754d34eb. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/FR4GL1070262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb566d2c1377daa0282b79b94fcc86f7330a94ebecaa0be38329a45a05e017a2. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/FR4GL1070263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2e5b958b31e07fe825ba541f4ac8d287be0bc84a745da03957f193e2a85a02. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR4GL1070264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31dc03cf301823d4cc7ba88578d53655201d24b7ef069c37331dc6a4c8bdfe2. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FR4GL1070265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd63d12cbce6d9fd366b8c147a4cd3db5076ab0319aa2ddb037ae2ac39a89f1. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FR4GL1070271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1813b4cb453b323139333217e1f1fc34484daa5abe1df61390c1cd254df42a8. 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/FR4GL1070272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0076bb8e29141adf6f67aad2c889f58c18a0ddae570e69b0012f782641401114. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR4GL1070274.
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