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 0x5b8dc2a98b0e6bc257bfd4f3a8e34cb977fe583111c8bd06c74dc85ce3b0f8f5. 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/e3e2adf7-7d41-450c-93c6-d268944e8034.json and https://artists.proofprofile.net/proofs/artist/e3e2adf7-7d41-450c-93c6-d268944e8034.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 0x9e37e777d5839ea0873769ab304c1010788f3a1fc89209e593dbeec645b80120. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAAY1122781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5315f7d8eedbd585707542b2fcb5b1cd560b85164b3bc25b2834094811b2e331. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAAY1122782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef17092da26ae1a03ed02f427451e9bf80998993c2a17125fa5c80e81484538. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCAAY1122788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd565f4533c64a8aa0573d2e835da3c9593267685e430ee3a696ab6eb60813779. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMPJ21300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a55480ac8e08bdab6b8090390fe06505f0fe3fa7dc67bed6d61988017f7231. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMPJ21300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806315062566fed506a059b10eaa4038ac7eed8c81f91b68e3108b85930b8306. 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/QMPJ21300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a7899e308a688e2a0c94ce3f0820162edd86a1c2c63ede126f01ec42810303. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QMPJ21300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070198ea6defd15bee67048cde68401bc101f5a742ce59c130059c46a4a2e37e. 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/QMPJ21300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b4b103f4bc66b9ffedd2115055203c2dc0853b8e4c99148086e1e2adea0641. 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/QMPJ21300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2bca913f2aab533e53fb400b9311200bc672c64e9b365f9f3bf8d1e459c076. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USLN61600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa281e85598f0d7861c1c3e0548fac6c09cbf95e5e3b42e47ea503ecc0602b715. 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/USLN61600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd431067e24258745cdaec5d58b73f61e9cba1c2ae47b7eaec050780b9ddf7d2f. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USLN61600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed83c612b4f66c342b0ee32e7128bfec0e873e0b9103f8278c4f633b2e6ede2f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USLN61600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d046cb98140cd7ebab8d5bd05cc8b326b0eb3da194c98f3801da7424561165e. 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/USLN61600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5441e82ac854dab8ba1ae4a7d7620ac114fcc6ae679f0f77e0f63b00ceace21. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USLN61900507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e9253b8a238015b1ed8db64d2bad76320720975fcd545416982e64e11d9f5a. 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/USLN61900508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26acbd643b7de66279ba59d1c1a2daafb0225ba2bf33357ed749796e0bc27fd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USLN61900510.
Dead Man's Town: Born in the U.S.A. Revisited
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b32dce05e48a10a5910feab2fea18e147faec52fea2eb7a49cbf07b51597df6. 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/USLN61400252.