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 0x28a7b03bffe49258286568f23156350dec7485af7681d16f72d1c686ccae9551. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11b7a4e4-7572-4e62-804e-c2ac34e77a92.json and https://artists.proofprofile.net/proofs/artist/11b7a4e4-7572-4e62-804e-c2ac34e77a92.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 0xff13db7461f27fcabcc8a7ca5686f6fbb7accfe21c20f8847bc49fe31d6d6876. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEAR41611352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbd8c4f5b45810fecbf0d7b2718e64b657417b629945940cb3510bd0e327ca4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:18:19Z), 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/DEAR41611354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad8e275c5b8e986c1d0d82caa7fb3d5a8c7b1dd68cb757ab5bb6bf682ddf99d. 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/DEAR41611353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa907aa3b4b0615a395621c78e0e19c76e2cf9781ead794f21272936f05f83ae3. 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/DEAR41611372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3563ea3e1eec6ad990e49059a678123a66ea8daf3f2d1a07bc6653aa6c67de8e. 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/DEAR41611373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09444e48253320bb55e9c5d3ab63072a936b9649f10241784a6a42babf96543b. 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/DEAR41611374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bab33d5f0f526fc77cd40dbf6ddc21aadcdaa711cf0a091765e539d91be0dd3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAR41611375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8b43b0ee19a6556da41525ad8b4c7445ffe52ea371e6cc930e37c264112c99. 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/DEAR41611348.
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 0xb8f425b80bca55136a227a142939fc39c86293ca0fa663d7576ea556e65925b3. 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/DEAR41611350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a3dcd7cb86c926162820e6c6b5ac7b53f2c706743b9f39aeb4ca7fde07ad46. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/DEAR41611371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59896422e34021dd6f67690dc13177bf8c16204a17cd3c7b7fe2f0f28eec4066. 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/DEAR41529322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba4313b8070046701a55510dfc2410bcf202d06d618f8e4f609c6a372fd517a. 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/DEAR41529323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57030bd52864b370701eb3b0a4aa70126f7bb0b1682c464cc8c22932fda3d483. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAR41529324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae625a983dc444f8ad68c4520e1ac3da635973a26295850a9eace332b633339. 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/DEAR41529325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6762b6a4c107d48add08d55478e71088be97768b7a1da3c67909a79edafba01f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEAR41529326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2873dcd131e556b88a7d8af53618f3c43476437d7d6233188c48ca7a4de4e269. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEAR41529327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdf2ef61e367e43d825bc234417a5c5d4b8ca92a3203d5f74092eb7af6e89af. 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/DEAR41529329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be0e3fc66d0ce123cec359358b3dbd985f7a87e288ddb89b25083b49bc4607d. 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/QZTAX2370035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6cd3066623aa31cf212309b46f101e2f7ad082e61bdf9fb16024ba04bb574a. 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/QZNWS2304220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20a948c4d6285bc6a22f3e8f05cce99c8f1cfdb16496a5e4e83107d72cb174c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN52389551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25722b1580018de2548750811ded2a465cbcedfd4b6644bc9a6acaf8174a789. 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/DEUE22178851.