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 0xf7eea27fbb8f4d86fecb9fed8be3d026a4c2451479e8554fde43ed4e66a7a385. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d83f1ab0-949b-4754-a617-94aceefdb5e5.json and https://artists.proofprofile.net/proofs/artist/d83f1ab0-949b-4754-a617-94aceefdb5e5.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 0x413bd0964a012c55b804bd40f34d2c0fd776e91e44afcc780710a31df8f25274. 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/QZNWW2168270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78bf15ad16569939f6106afb8c2608164aef74869d05c5ad839a0c5ffad0bc0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHN82149751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb333140d0aec0127ab708f74202e813628b2cd52ac146a1e266c9e096d015fbe. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZES62121454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e7b8a35b10c401f98022218e3670fb168d954110e63a020fa5b877283b7bfe. 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/QZNWY2133035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7cd84d1efb2fe18daa3e2450fb997171d9ed9096e2f1385fa5631d516ca9ef. 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/PLC062228704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983bc05403f38f8b3722b9b2a4028edb64bbfad033ed19c5f609f7ad40939a9c. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/PLC062228705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1817e1811137d373d7dfece99de66559207bcec1be8a7da4a81da4c8d4860c. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/PLC062227736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edba2fa6786f037e5deb30db480d451a2308a5f80346163077d5f7379dd9ed5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLC062228706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982b005e04140c883b1bac76e4a6be364b0bcd2d5826f8bb9463c6342b8192b8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/PLC062228707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50be5ed3ec7a8878069359a73f487a58514580144c5928f1fc1d4236a651d4b. 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/PLC062228708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a2f1520c6b7f7d077fc286dc4f2988ffe4a888618f2372fce62e26d6fa4709. 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/PLC062228709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d7d5fcf7c8a618f0ee84b711aed3f60cf4aaeff5d2bf84a4fd4299b32f7847. 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/PLC062228710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945562babf6ce5bd3092a17de83bb500c94274dc94a49225774b7a43e165aadb. 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/PLC062228711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d36bb4f7b994095bd41bbb6a1dcaddd8a0fbb25a40099a82fdfbc07ab5e46. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTAS2156872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39140443f50abf58c6083c57a5c15b40dd562aecb429ca9b63e1126c20e70ff. 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/PLC062228712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cb90469b29f16e351c96d360b84c12661e649f3718193a2e276b2e19e2f59d. 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/PLC062228713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a78224d5ebd21b3950d5e47285cd21dd7f595fac595a9b4f2030b137d48a8a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLC062228714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf643ad59609264105bd4876002ee0ee64a39eca691cc379ea582ccaa09c431e. 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/PLC062228715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c50a6da4ae5fb2e9c6b14f700ecd96e2901d249ddef7ca4871c47c93445aeac. 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/PLC062228716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e7b8a35b10c401f98022218e3670fb168d954110e63a020fa5b877283b7bfe. 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/QZNWY2133035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7cd84d1efb2fe18daa3e2450fb997171d9ed9096e2f1385fa5631d516ca9ef. 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/PLC062228704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983bc05403f38f8b3722b9b2a4028edb64bbfad033ed19c5f609f7ad40939a9c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PLC062228705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1817e1811137d373d7dfece99de66559207bcec1be8a7da4a81da4c8d4860c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/PLC062227736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edba2fa6786f037e5deb30db480d451a2308a5f80346163077d5f7379dd9ed5. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/PLC062228706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982b005e04140c883b1bac76e4a6be364b0bcd2d5826f8bb9463c6342b8192b8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/PLC062228707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50be5ed3ec7a8878069359a73f487a58514580144c5928f1fc1d4236a651d4b. 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/PLC062228708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a2f1520c6b7f7d077fc286dc4f2988ffe4a888618f2372fce62e26d6fa4709. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/PLC062228709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d7d5fcf7c8a618f0ee84b711aed3f60cf4aaeff5d2bf84a4fd4299b32f7847. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PLC062228710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945562babf6ce5bd3092a17de83bb500c94274dc94a49225774b7a43e165aadb. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/PLC062228711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d36bb4f7b994095bd41bbb6a1dcaddd8a0fbb25a40099a82fdfbc07ab5e46. 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/QZTAS2156872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39140443f50abf58c6083c57a5c15b40dd562aecb429ca9b63e1126c20e70ff. 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/PLC062228712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a78224d5ebd21b3950d5e47285cd21dd7f595fac595a9b4f2030b137d48a8a. 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/PLC062228714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf643ad59609264105bd4876002ee0ee64a39eca691cc379ea582ccaa09c431e. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/PLC062228715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99721878cb1b60c2860ebb5c335919c5cbd36cbd74d93cdd6780fd96e68d177. 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/PLC062232001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4df65d7a3b9b7be6610b7fc81cd6668a61eb775318a0345b2c496ecddefa6a0. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLC062232002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d534949622bdad33025aa49019f21cc5ffc3d748f1363c618cdf1a4d1bef32. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/PLC062232003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654f56fff1de032d4d6fb87dde5364844864c5a0dbf9deacf10738d344139395. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PLC062232004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfb4be11f88e9c4a0a49742a58787c85200b68803157f5085b6fd66736cc5e7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLC062232005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1855ded9543496881eb24c5a9751c3bd0abee1d685e27da7f11ea31411fffe. 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/PLC062232006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8404647dc850f076acd954e010b3ea7a3d703529e5d82aa85208684f5bf83a77. 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/PLC062232007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d410d4c40b7c30f3650485b367caacf3d75ef4cee46bbcc881f4490c8e852a. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZZ7U2487301.