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 0x6f437bef4213bb357f68a5cc689edbc4aabdea09ab6dec65947729f3d00dad43. 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/ccb86b77-5ef0-475a-8a14-279a0e355d5e.json and https://artists.proofprofile.net/proofs/artist/ccb86b77-5ef0-475a-8a14-279a0e355d5e.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 0xaa135680cf79e701fc42e46522663bc7e8eaf4d798cab9ca3718680e27324a29. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:19:56Z), 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/UK3AZ2029603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6af6473d88aedfed248d6a39c84ec3335f38bf9f9f01eb10b18c79d18fde96f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UK3AZ2029605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb168795d63db059d4339de1276443dab5e9e78390734e85ff863da393bbe0415. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZN882083198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ef5b65e00b2b82ddf4547e2ca9d44c71ff08c8fac874fbd386f8764bda73b8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZN882083193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9694a68da3470ff84e7e329f391b4aafaeb593858a6db527376a207c7b86eb1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZN882102808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a4d46e18479797a03f41da8a999eefd61a9506b001a850de9348a386466d4d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZN882102809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c68a8a8c362d699f8d13b01085d61727b34e62b8b460c5eef26f197219ac2a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZN882102810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98207accea254cbbe608f5a3ae083cc4cbec8403ec4fa15bc4fc0f150c29647a. 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/QZN882102812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8305b96b2569209004feacd993f5fe367a37264047cdb03f30633e54fb83ecde. 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/QZZ662367868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3efe5fcac5a4a1cfca12b4ea317d8db2469db3e831c5212c36e65f695071cf. 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/QZZ662367869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79b78552fc7601c4d4af0919d69c8a348e689361e6960edd93ec3b4f60637d5. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZZ662367871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e3f183aa6f7d45b93b3c833de3856fcb151ad2739ec794d801241226d82a83. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZYFZ2406500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf13713ef84c454f10a1067daee1b0f1963e6cd75711a23fac3bbfc8877e9198. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:39:25Z), 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/QZYFZ2406502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5056249fd9d10c8f214f243025e9885441b013f10a2287fe2dfbf814784abc9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZYFZ2406503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb244f9cf22aa2ac74002f45a6f20df608919e03af184f103386b8cf3961fc761. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZN882436077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c0885f373f1384bb33c913e0a08ba3d0726f6dcb42fafcede4343ff51f6f5b. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:05:34Z), 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/QZN882438431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b40e4b9d9a08de1c89342e84386d4fcb8b4c9f5fad75972c5846d4d683828b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZN882438432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b670056f132180ee7f092f083da1d803fbc8516f66744623ea833143a847157. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZN882438434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ea970ac35055dcdc1200ddbe18bbb1ab09d8a68b19e98803a95088f525b30b. 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/QZWDW2567987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d176089841afa9e6068cec0c81db0081e501aa32a65734b8788e6492ec73d5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWDW2567988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f3b816023a04e26f398f62f0ac4eb6003f36f29e8b798676009385828e3c8c. 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/QZWDW2567989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb165e89a7112199747e1f487aba43f2b0861dbaf03c483d1b418f4b225927bd6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWDW2567992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6e66b70928122e663b3eb19771865333b86571175dae4696da7514eded2718. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWDW2567993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e481bf550237a81f94577275054e6bba8259817988ff0f45404c293630e99a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWDW2567994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c27806c29899495239c5ea4125496869a9cbad8797ea71893255de6ac06f42. 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/QZWDW2568896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd453418f72564b13c8ae847d78f647e251d4384fe19151b5f4fe24c25da524. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:50:26Z), 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/QZWDW2568898.