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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 0x70192b454625d78b29c64299e4b252f5ffd44f5a0d6f800cc0280ced7c075a85. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34da30b3-f186-43ea-a4db-efeeca2d473b.json and https://artists.proofprofile.net/proofs/artist/34da30b3-f186-43ea-a4db-efeeca2d473b.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 0xc4151f92e62e8250ae327c23ee6ef00f7744f9afbf9c7d71d481700a2d38c4b8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:08:30Z), 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/NL6FC2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cf1c366f6f511d887c8d1d1c96223054b56df488ff8555373f074bf28e0af5. 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/NL6FC2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff7c4d5ef6b92cfaea86ca8b31ada8410cf782a494f786dcf1d45917ed634d7. 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/NLE871263607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8f482b25f7a77811ae26586c91549928032508c9d7066ee12a79f5dce4506a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLE871263605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8cb79f480e88d3f41f03559046d121dacfc7b6b6047a8132c88fc26c32094e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:12:04Z), 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/NLE871183006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86579f06c8b46e1953d5217a70daa18744f33f6ecfca07cadb7bbadbe6dd03c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:37:39Z), 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/NLE871314401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7c65a87386667ccf9b2c73b0bb254d07f6698350e3592751c48eb0a5076317. 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/NLE871440703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aff8f0f647dcc194e490e3e0d2ecdd9f0aae4be0e929a47c3839b31c82bc5f3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLE871440708.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137646022325d91e74734866c164992a04181ea3eb2ede5468ef124afe1b414f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLE871541001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26fc6f93b863a26eeb0093e05613d7e1b05665bbfd1bcf5edb7b57b1b4675a21. 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/NLE871717701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10f82f919c16f578c03f57b17e3df5fb5f9880577538ec3259bac7e53456c8e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLE871542401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5c6e91d73f8b0ec8fbc2e4a6e34e7b9a9a125349318ad4fa50e76964ed1171. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NLE871717706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7886acc38ef08a23b06f6110d85063ea28af33821a07e3236c13216cbfae37d. 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/NLE871717710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ab1ef75cbe62e97ea69d486de2e09d96d81509bd024bbc3ba09a38ea76c3ea. 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/NLE871741501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42555be4c68211759417608e58350112b6d7b95687c132723a5e2ebfd8f7005. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/NLQ272200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c74978b44ce3af0aaab2ab1553c137053ae5885f35a96dc1a1ad1b306e7959. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLQ272300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229d38d89148744099b4b99b3b89b9013abdbddd1231d089b8396db6fc8897ce. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLQ272300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a4c04a1646eeec3da4c1e447cf1a5738fb6fbab1c4f0d88d176f734b95dbf3. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/NLQ272300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf76ce1c79d6b3e95d0a641243e4bf3268d31b7f89308e32cda6cd86586b539. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL6FC2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d93f05740d3017d4f36df49e10c182ecfb98711dceba1b12c587fe471d0e71c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/PLH342000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3093bdc4ac799e66c5248077bfb751611ed3006f0c6f5d822bbbb2c1b272684. 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/NLE871938300.