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 0xa24801ef4da671043cbcc2de2e197a5645962405561bedd9e7c6d82ca5d32e5a. 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/0858e9cc-22e7-4c25-91f0-26225f3cb2d1.json and https://artists.proofprofile.net/proofs/artist/0858e9cc-22e7-4c25-91f0-26225f3cb2d1.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 0x7c7945f886fc7cfe65e9495891f245e121a4c12545c597abc2b91df0bd69fcd0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ62019312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7945f886fc7cfe65e9495891f245e121a4c12545c597abc2b91df0bd69fcd0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ62019312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538d233064b818bc67c5219dd9a6377546acd341dda0d7d6fe3117f847bb3dd1. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZES82055302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd38821b1d8a9716c565beeb680ec131f1474f5aae9cf4930a4c1aecaa369b6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6J2153246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed181c135df14199a0041ce8982b5b1ce755e8a65fba6a90145e8c19ef0dc9ce. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPLS2200776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd39228ef166d8556eadbc34c4015a4efe03524ff9f6940975fb4694c2b0c7a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA72343954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77c6c58df61a142574c3b1295eba2eb509431b3ff3f81ef2c0854d5a3b988de. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWQ2350621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebedd533a102b2874d790f8d876082eccb561e1ec095ec0e31131fbd0c1629f. 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/QZTB42397964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b88e8e1c529dc95158ded637ad2f1a8d404cf42735e1c5ed836a92b857d6375. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZTBD2330099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621a828f52fcdea583108552b74a09788fb6897cada97caa2372967cd98201a0. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZDA42330466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0edf2ad35199593d77ec829349f5b94850151f4d2697ed9bd8a58da46ba45f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTAW2318436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a600624ddc76df0895b7b3aba699b69ff37f6876db7e4b3381eb198300be60. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/QZNWX2347969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957b17c4c6a3dc935ec2e53f94f2b6c247dbfcfa5b1fb433a13b21a1c3dbdec3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6K2325066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f92ddea0f0c2135df09afce7eb589a5047d246b95db2dd15004262e888a900. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA72473934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cccc078ad158cc5b1ca06141661182131f19926421316d007a738603e75412. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNC2439180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faa86c437a45ae911a8ba7943d2779a7dc01ea1e1f205fce8252625a1c20576. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6K2422112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ee2d2d9e92db651187b46854017eaaa40154bf4cbd8a9a182dda37a3a9ff1c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWT2427821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd563b1a2198fd87dc9120c2e4c4ecd7e152de44d731f51365b6ac2c0ba8636. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB72498993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccc8be2089a9823d420b45d7d14e20ccf5cd5136419c64a743e24ce9fd11cf3. 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/QZSYP2193934.