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 0x8a2118ba02171b6d9cc8a8af23d73486b5d110db89146111e08b2e34d004da4f. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/326c5819-84dc-4d28-84be-0478c8891bf7.json and https://artists.proofprofile.net/proofs/artist/326c5819-84dc-4d28-84be-0478c8891bf7.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 0x4414f1a1b26e44c846502f3290db7202a5b0b89e0651e253fc6ce7d904b6300b. 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/FIEFP0400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3caaaa67ddb5d66698bc3aa5d712a4ed3461148cc06975dfb2dd01dcda6c77. 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/FIEFP9500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007d50f703bc4609019f4228f37c06ed104075efa131e6dc5e4cf3c2b7501c0b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FIEFP9500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29505fbfb46fbc63853777754714d17baeb51d85aab3d0161ddf65ca1cf17e14. 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/FIEFP9500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bd410aa1f2dcae391619682eb1079e371ee75a34ad04d33c9cb2c9e0b73048. 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/FIEFP9500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d6990d9f95010a0b2945543c0d5b8278ee05110876113ec0a14cc84ae3871d. 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/FIEFP9600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4131a5c77dcb87954f7724b2a8eeddbae9fc2d29140fe69310f8b5e31fea6976. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FIEFP9700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e854b837ebc5692d47ff0693e5f0f8496739fce6e1843d5cb43ee79ebee07a5. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/FIEFP9700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518361c3575a44f2e0c057a1073b78861aa5b3b39a7a5fa555549ab827422247. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FIEFP9900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2806cfaeb168ab871f7ed99a3dcf2d36925d8e0cf417af89efbc28781a55810b. 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/FIEFP9900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a660dc9eba0c702f50a65f66cab3c72b2f50cb0b4e83b7b3d9ef0a4e91e067a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FIEFP0100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35bbbe40f10106600a64dbc4487e7a84b93ef7e0ba664359c415fc653fc67b9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FIEFP0100114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e95cef0dc4b94dd764c64a53c75eb55b1a341291952fb761d1aff92ccd6ee9. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/FIEFP0100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1bf1c479eed66357f9055c8ff0772f94f6ef1dec5082824505749e047d8e15. 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/FIEFP0000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ac1f34cd0ff8106f8641ac89a934c3bdc0c3f46609fdc1f9221d7d1b93516f. 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/FIEFP0100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55c7b0de1ebf943b5520fd7b8c04288fa60a0379ede9492f92f03b071b21e61. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/FIEFP0300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a76295765f0b3408f496bf29f468e3d0bd8bd9a83ecb135404a4dda78dd94f. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FIEFP0300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0856a2e3c12c4b3e0108b126d2c03630408a297a7c2c0012cef8cf2abcee0c39. 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/FIEFP0300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08588c2d288132c7f7f8315d699f27dd6d9e1e5445152588b17849351adc9061. 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/FIEFP0400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9b4358b76a4e4fa6cd63a38ce5d5234505847e8adf58b8b2cddbd620d6a2cb. 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/FIEFP0400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01906e1449639d97f58a9c270ba974f501e6d749dc780f3fae84e83f0e81b3f7. 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/FIEFP0400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7981e12c0f2a8efc5c3c152c85f77913d29d0ee4ab5da91b24a38cb4783d921d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/FIEFP0400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506b69b92e1b85b04fc8226b5095dc6b774bb05585d6baf55b14fbc5cc825cfb. 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/FIEFP0600015.