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 0x712b75ffe29dfc46318ffd999377097f4ec2d583ed63c03f639305d46eccf112. 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/af6dd9c8-6f08-4db7-a158-4396723d5b03.json and https://artists.proofprofile.net/proofs/artist/af6dd9c8-6f08-4db7-a158-4396723d5b03.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 0x67ee53d59c1059397745d09d252e7364cb34b680ef604890c58cf95e73d36309. 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/QZK6J2267165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dbba23babc6d1545344036cdcec05d4075145a296b180ee8053d33dfd789ee. 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/QZK6J2267166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338a5e3cb7c3ba155fcc342e5ffa542dfbbcb7de5ac308c4b9b70394386a0879. 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/QZK6J2267168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a4e86cc5b7d2533d6bb94403076524982c3868974cd25a5d5756baaff7ad3. 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/QZK6Q2233560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e03b2dab2ef8f5d4397c693f298b7e8311fef8d919bebfd97bb59b243b26af. 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/QZES62206678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad90d1822b746c00b601ebbf896532a6396efb51c33bc260ae0e5350a39733. 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/QZHN72151236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d21cc439695f2c7b697fc6503f65ebd8d2c4517ddf480748da035b9f4c82be8. 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/QZHN72151237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23799ee8715602636f9774ca5395d8cc0b285af0e2eb041e81357b4ec8943746. 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/QZHN72151238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597450961dd5a82adbb53f7926125f763d6ee6ed0f7e97c8954e3488741603dd. 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/QZHN82123388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3580a455ed703c76802e38f10fd1e3fab484b7e4d44b28187db43c2a2fce0fbb. 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/QZNWQ2055869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c2f86288f12a17aa9c623e87eb5b00498583e0a0e5c9a84390db85803fe866. 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/QZHN72151239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d593eb5d3e2ca12343aa1dfdd15639397e5fa31f0ebc775729f08bc854f14f4. 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/QZWFF2373320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a30d82edea929da0fba5df4ca54b7ae687bac88dd4a80ac883dc5552acbf13d. 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/QZWFF2373321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a414496ca5637f3bd856276d7664117e3f0797c0b49a04c5560a7507c16600. 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/QZWFF2373322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef8370485cee8d4d940d015582a9fa04a875059ef822491e3c0b03aa511ddb7. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:36Z), 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/QZWFF2373323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bdfc7fd5f1463c8e2eb2d446df1219ccfbebfb4c864a0ba46da80f788c71b6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFF2373324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2af0c54699d187a5c781ac9d950c75731ad77a0f448e76950c3039afcaa52e5. 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/QZMEN2397081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe268e24743c654bf0bfffdc2309769eab9e02041c927b4fd31749c1bcede1d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMEN2397082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96202dfcecbe6d86b84cf8c3b0682a83785b25c724798e9db26999d15f07ba6f. 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/QZDA72307870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8eeaf8cc92b34063e436d135868e5e96884159c35c9a6e6c830b7f99c701cf. 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/QZK6J2324204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec4a1db6f439bb8626f0f7db9952e0d2838264922de774201bcb5e985d54a42. 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/QZMEN2397083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8eeaf8cc92b34063e436d135868e5e96884159c35c9a6e6c830b7f99c701cf. 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/QZK6J2324204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b25426d246bfe2128cb045ffc598e19871e91a518f4d58df7cc0f8321c8ef99. 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/QZHN32311203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96202dfcecbe6d86b84cf8c3b0682a83785b25c724798e9db26999d15f07ba6f. 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/QZDA72307870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a4e86cc5b7d2533d6bb94403076524982c3868974cd25a5d5756baaff7ad3. 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/QZK6Q2233560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e03b2dab2ef8f5d4397c693f298b7e8311fef8d919bebfd97bb59b243b26af. 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/QZES62206678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbdfa18b1574b63f99fdcb591d3d98b92e1a5c3ad89a992fa430d46c703ada9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWU2136005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3580a455ed703c76802e38f10fd1e3fab484b7e4d44b28187db43c2a2fce0fbb. 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/QZNWQ2055869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1f083c579d0f482a46e9854094814b735a56e497e7e2cab1166a0b8df7cf70. 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/QZFYY1909557.