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 0xe48636b9323575c1de4c92f0e1ace23bd59e4d364ae541daa9e3274b1cc19cd0. 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/613c17da-35e7-4b02-803b-9bcae542c0e8.json and https://artists.proofprofile.net/proofs/artist/613c17da-35e7-4b02-803b-9bcae542c0e8.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 0xa0aa268b9e6a7ebdcbbcbe11610e0e33864ab4f6a57fdee66ffdbe02ce5a2072. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:44Z), 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/QZGCD1804504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bed227afa155386e013071a0e9f08042ab2be22a45953a713ff27f500453ba. 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/QZGCD1805076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4c6e1f4363c86414c40457c3ec1e55b29ad81e1e6dea2bb906641a723ebc29. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZGCD1805083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc21a84fde0d2cf6501556b45f9d257a7d1b3d9834e84907d25d9b7e1c6dff7. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZGCD1805084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c5372651f02328b7f2581844406a3c8b187bb7027c63166074af4517cbed23. 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/QMEZE1910580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9113add15c3c2126506baed725751bfe7c20b2af9cdae951dbc358740e03dc83. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:27:01Z), 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/QMEZE1910583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037c48cad55728de3dcc593e2c7b85ba21423f605a80d41473978e2ce29c42b2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QMEZE1910555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bff0a0cd5ff58739ae8c8fdf6c5ae133c2aa9fcce90f97a2571d28df34543f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QMEZE1910556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0b4758957db436a9992c7e1aeaece8772c4a31427e49cdbdc827964487454b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMEZE1910557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be5cf99eb27f8c3d9d6472ce4debe0d5c53b426c7275fcbe249e2b558692fc7. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QMEZE1910560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaead69c7220df673ffa5cbc131dfa0333183abfaa17fd3cbc17aa0bab210c33e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QMEZE1910562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0152be53e89be51db180f403be7fce78221da80339856e43637924ff8dc08ab3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:47:12Z), 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/QMEZE1910568.
Liên Khúc Nhớ Một Mùa Xuân, Hẹn Một Ngày Xuân
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd613bc504d26dedb28e6da07d4df7a8994a01054b8a5aab810342bc600bd556. 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/QZGCD1808375.
Trúc Phương - Ông Hoàng Của Dòng Nhạc Bolero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60075b69856f4d75ab855d65c4fca8bae37b0bbd0140fe810a69b7600b327c64. 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/QZGCD1806011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8482868cedefd3486ff1bcdef21c31c717452e896ab7995a55de4bb79cb085. 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/QZGCD1808401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdb4a3f462b481aa5d711c2b50100ce190937859fec3fd07e47493484d2044d. 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/QZGCD1804859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8567082a90876310341a62c79b41d5cffe2bb1d8d70768bd713619687e8ef0. 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/QZGCD1808361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc67b94347ea10b6214f62975b2c9cbbf74824ef994da064ddc6b46aacfe468. 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/UKXN22280535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebc34be5fc96dba722804d39d83340fce4af32a22c6089d6de9175f9d147c11. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGCD1805936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897ef14f3ba0a1946c6da97dab2bd91b556ef70140ab2bfc9d93736fa5141c5d. 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/QZGCD1805011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8597d6dfe6815e913dd2cd48493b542085edcb328e5b6827287a4a1a09043be. 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/QZGCD1804654.
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 0x0406947828388e9d07ad4a97dc704151a3bd582779c3f48ccaf1c6b3a2160293. 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/QZGCD1805944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd88187fd0ebf5b446645e20ea96bedf635367302bd6b41b3d3e45484a38e89. 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/QZK6H2189541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f82685e62295759d3c357d6a307da65a01d6ffa127d24087759da4c664bf794. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZK6K2163041.