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 0x5d574816f2337cd56dc45ee461b98556fc021ff71040c80603fa5398b0cbb6dd. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/611ea6bc-5311-401c-8f87-d6f325c106ec.json and https://artists.proofprofile.net/proofs/artist/611ea6bc-5311-401c-8f87-d6f325c106ec.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 0xafb4746fec1868425b5e70bf59ea9b1e35665db4a2e8e1739be17f95096d0e0d. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZHN91978108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02ad5f194857fa923bb6e4fe4fecddcce9ec2b44736dfa7c1a6615b3550cbbb. 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/QZHN91978109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3512110628c7c1418f027a3c2ee3528ea0667dba62698b284a0261d5aedbd824. 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/QZHN91978110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da06acf72ec14efefef018ca1de15ab53c99f227af37bbe36769f2a0f820931. 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/QZHN91978111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24c343c5121c9eb79a402b6f29ae28b8d6d0978bdab8a5d87bba54b4e9f69ae. 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/QZHN91978112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64183bd92535d515832ac4e613ced73a24b13217ce4137af3ba1018e6277fcc4. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZHN91978113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320ef48cb975076b23b6a91358303f8d1675ce1f209451404445b3860e88d1ca. 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/QZHN91978115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029e1cc25d9aae95d6b8357dd125afbb8e569e52c0a00ecad360b1e5b42d6f75. 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/QM2PV1588865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d581a511b9e9e7e2a7ea6263ff61da9d88bd34ccb13bf3a83e26e7a5094b64. 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/QM2PV1588866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1b4d6aec670b2706fc8263e1d93767c8f201494d3bf472251961c03a897b1d. 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/QM2PV1588867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c06dd46d8d26e379357e284c4f4580d424cff06d9e5a39b1584a613ae92d214. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QM2PV1588868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0677c8a2d3e07709e737ee8160e514fa225372f9e71df2be3d19f0d7960b0fd. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QM2PV1588869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc580627e6883bb298e934c90c7ca30a15fe58777e4d06c1aed8d4057a92a16a1. 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/QM2PV1588870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2165e355d7299bdc2c0954e6df1e2f4419bf80df964d449b4a441c278e8b302d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM2PV1588871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3938c5859c568ec6564988dad28eee63b12b75241a6252d0130a2e22b68a8166. 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/QM2PV1588872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458fd77810c1bd2364a20ea9672c076cf5885af95e2f619dd7de594abc1eaf64. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM2PV1588873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9a52e53ecb0d585b630a911efe50a5821836f1bab82171c40ecab10f70c56c. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QM2PV1588874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45ee3ed4b279ff4de4f51c6ae9c49c379ff36b8ed0e5a8d9e3944048d3d37f1. 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/QZES71878785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd697422487ada33fc53d0fc9dbbf3a33d6391b886c52cf7736acf52a4b6f1433. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZANL1744897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c3846b59d1f8d69172d2e1b264d7643ed452c799c6bde9ff224d82c06890ae. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM4DW1619448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9260a2b883de511959a828c1d5569162cad6668572199602db6dded126268146. 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/QM4DW1694670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdb40218af420e97aae0777f770490dc441f8224b6a077445da5da91d803117. 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/QM4DW1694671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d6d7410ccde695ad99a462804d51fe5f4466726b6b6616128b833b31281ab4. 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/QM4DW1694672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a7a0ecf688fa0ccdd1819250059ef3a646a23b8a2446fe942df44b323fc7cd. 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/QM4DW1694673.