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 0xabcdcd6ce3e7827c00e5159a7768c0d8796ef962a45eb856ecaa8acc70e43463. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5321d91-239b-4bb9-b561-8fab22debd64.json and https://artists.proofprofile.net/proofs/artist/c5321d91-239b-4bb9-b561-8fab22debd64.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 0x69c7743ee73dd5f712d13135d141452c74f182853510ea1fb88b2bdcf75053c3. 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/CH6541766862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94042ec52586aa8c6344a1755c77e1f331d5160dac0c3266dcea6ab3a5732235. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/CH6541766866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898b99f3fbe231e9d4739763741abc145a38cc14bd2058191a38d69bfd391e87. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:29:03Z), 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/CH6541881425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ad6451c235f1a6a0e4180eae5857fc604dc75042bbc3b87b969fd33a7d3914. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CH6541944365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde61a5452135978262b30bfead00af2037d31ff1f879965d90535d1838d5be69. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:50Z), 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/QM6P42009817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fb23252d02c5f8953b40424cb4f5d3ca9bc526d5f80c655c1050bb77ef937a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CH6541679726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fab59a8391c6adac0a5a2fc7f8bb6c176d6e2f80e1284fcc05483cabae346a. 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/ESA012235251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fab59a8391c6adac0a5a2fc7f8bb6c176d6e2f80e1284fcc05483cabae346a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ESA012235251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8f75f0ece06b90f2f94acfa546020ed806ba627e9f4257571ee24b7dd8150e. 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/ESA012261898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8f75f0ece06b90f2f94acfa546020ed806ba627e9f4257571ee24b7dd8150e. 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/ESA012261898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fab59a8391c6adac0a5a2fc7f8bb6c176d6e2f80e1284fcc05483cabae346a. 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/ESA012235251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7788479e181066e494d614e62398795e7440ba175b84e37721d33b27c0b45142. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ESA092207147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8f75f0ece06b90f2f94acfa546020ed806ba627e9f4257571ee24b7dd8150e. 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/ESA012261898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5700f9dbde8b72161ae464af775b270ed4f42744eca6f605f0a18917c82c98c1. 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/ESA092207148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b624de8d6f478294a0f153d7fcc0a4f9ce5fe087cebb84482acfb5fe5331a09. 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/ESA092207149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c800518cc5a0b7f48aa4fbfe7acfe301061d49cdd2f45aca35b645de0598f7. 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/QM4TW2350861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44048bbb962da769807b899d858a20815d11e3211061c81abe567cd8ffd49d6a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:31:08Z), 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/QM4TX2307835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aef71fd0804102611ae8940847f102c5b3ed0ba4626c1371c344e9c0e56ae9a. 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/QZGLS2301041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc324707f2fe54360f403b79b4ad4ff80659b1566577914d46c464ffee624d6e1. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNJX2336590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d31b11d74c0d99a2c87d5296fa3506b116beb296430305024edd8e4d2662c40. 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/QZW9K2374433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5912b6fced232da1db2b4647a32f2fbd0457395791bbbc192a27426269fa4a18. 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/QM6MZ2450299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb90a8e7ff5b008c95485899fedd6a57f382c4654ade0ebbf1fcd55a00efb884. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM6P42420175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9437b7bb1881e7c6b1bf13a43158d6cbaa83240e6697597b7a193a42e1c725c. 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/QM4TW1928142.