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 0x5f39801e7e4cd57a1b695ea45c5a448b69bc9b1caafe3b045ef88dfef53ad609. 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/cee94096-829f-4fc2-9b73-f4989755a77e.json and https://artists.proofprofile.net/proofs/artist/cee94096-829f-4fc2-9b73-f4989755a77e.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 0x6d1d1588e485bb23c9b7ea94fea52f3b659023f475e9033de3f2a9d99e44b02c. 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/USCGJ1145791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f66a6d47012ab3e3fd4feb03934f5a7b0b30c8e897f30dce6b9f432f32cf1c. 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/USCGJ1145792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c18db156be0fa564e214279a966301a7f64675c696e427d5ed746b74ee73dc. 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/USCGJ1145793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320d9519ff3bb843a177bced8df6cfa12fb5ed38952d6a95fc9a015a561bc288. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USCGJ1145794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256484f6391da798c47b2a89ed0fbd16c4ab3739af91d6b4bbd9d330fea53129. 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/USCGJ1145795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3467b21eafefcb4aa9c8c088cb920149e11f17c3ec6a6f40be7695b3c5452ec. 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/USCGJ1145796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7560a2dc0e0683beeaf78f2acd6117a0390f2febd7d840cb4a6755ebb2c090dc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USASD1500161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d289303e20cab5a2fc18f3a190db9e7e0293cdf378c586f9865f5c5a5283e1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USASD1500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbb85eb3483aff81d802fcd712dfc419abc62ae191a84fa077a267a2c8bd4f2. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/USASD1500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a3510768ae0285d567da98e39ae7c9a107460f15a39e44f317d364d916e50d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USASD1500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a5ab5df8ff492c245f1b7f60bdb1d090d3799289552c62e394688d08413faf. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USASD1500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22b84510e42245d7b9741298c3bb6ba1e495861452c3289e93e60eed8a7ed13. 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/USHM91616373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d00dc10720b56fcc49e5b159c3e51a64107c7dbbc59d93883c4e2a7bd35fab. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USASD2100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bd17cce3dd6ef022e244b4fcb45574fa983b77d4898edbee4df704c78ecad8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USASD2100183.
Nothing Is Better (feat. Anthony Brown & Megan Tibbits) - Sped Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0e6fc3c10f3e93fe2564f21fd6b36655bdd0cc2a476842f34d26309a7a595a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMFMF2300243.
Nothing Is Better (feat. Anthony Brown & Megan Tibbits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd67bbf52a498c5ce56fca84c1a3014651ab536b7bba577325f24d66a524127. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMDA62391272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2954178cc64dacf23a61b8ce9cfdf713276b808161d02bc780a653e491d04491. 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/USA2P2043962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2954178cc64dacf23a61b8ce9cfdf713276b808161d02bc780a653e491d04491. 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/USA2P2043962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fda29f844c48d245f2e7c01fc359f4d11cf8272dd4fbe5ba8bb165e5bfc9029. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZVR22400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd67bbf52a498c5ce56fca84c1a3014651ab536b7bba577325f24d66a524127. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA62391272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a834b5f58cf0e689d39c02c96c986964accd6107e96fdaca4dbc9e6d2e72e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZVEM1880361.