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 0xc96bd0229e84dc3ab10cecb936e743e5379863d2d91cef0da8e37fe81766ecf2. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45807709-65f7-4d2a-84c7-c5665400161f.json and https://artists.proofprofile.net/proofs/artist/45807709-65f7-4d2a-84c7-c5665400161f.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 0x20221dc0494fc31e9edef6d4d04e07f7d8d0ea11991b74e3f358788ff9356f8d. 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/USL4Q2145362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca4b79528adac2d505ba9d5d2df3a37e23af9d119a59d8c21bb886d8846edc7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USL4Q2145363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfde51a0f37f38cb86e8811c281d3e2de4bae27ab14373a012d85f62302e4a5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USL4Q2145364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a052999e8851a5275f8393fb7216ab45b8907ff1b136c9cb77932ac9671623. 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/USL4Q2145365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04fb8d2ea1d303b3acfe72ee772b6a4f1ff7ab7a03e56f9f4acad7dfa07cd23. 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/USL4Q2145366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca9d5535c903205ab67366f7701fe48d85ecc118dd42582071efbcee79d9cec. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USL4Q2145368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f01b61292a28656eec42fba05d876da0ceef6a13a5d617017d005c64d9db0d1. 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/USL4Q2145369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d80abd8a2e35d8baa68b05f87869433500bad770bc240c6890fd7e5468a2ad. 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/USL4Q2145370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728be7903e442e3ea080dbfc81a363b1e4ea9e1f9c05387f0f12286c4a82bc71. 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/USL4Q2145372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bc9648a0d5be3fc645c106e53cbf379431af83111bf67a7d1e124f0b18b78e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USL4Q2145373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf805517f04998dbb6bb42e608ed131d28ab35331dad38b4cf5bb5d607583bbd3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM21415788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61b5d0e4debe415b25caa2d7a864ef602e385bf27d23ff4b0d7d5049eeb4cc9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM21415799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0001371a6f9c0b2ca998238d47cde42849792e48783ad97de7114c26910a5a30. 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/QZFZ42418150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d23ab3f24a49789103005d9174784ad7a674b1fad705814203a652d15970bd. 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/QZHN32378397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4da50efd64df06160a3100f2dc3f888fab5f6d9ac8c76cacd841ff01d0fe12. 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/USHM92251041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d80abd8a2e35d8baa68b05f87869433500bad770bc240c6890fd7e5468a2ad. 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/USL4Q2145370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60632bddcf17523a00f8c1853561cfc26b5e7adc1bc23cd104a5711601a8e991. 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/USCGJ2214581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056b59db0718b97b6cd92190b39fb01efe4a518b707cfdce1680ba59f5e16f36. 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/USL4Q2111996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905f8f86d78c3df6e5f6887588a9f697e5c56d3dd9732e76fc54ed501544970a. 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/USHM22138669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed925d2b8f68be9e3422a4c97d732e48232b5c67ee30b4fce146760919a508f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM82028496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252ab11a540e62ea3592e38113ede0e474bba40a4ddf403dc5548ec45cf0d460. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHM21936150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf768a1624e51c431093de435d21e4e5013128dcb22c4c232dc33ec6b4c84f2f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM21936151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99fae577e6d33720d97fa9641c7635d3faf3202c201a13ef4021ee42bde3cba. 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/USHM21909518.
Closed In (Piano Version) [feat. Chrystal Jordan]