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 0x1fbee57b2ce73d0db4cedb8a877713cfb509fb4fda381a49f572a42b7aa8e79b. 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/0cc0d23f-cfe8-49ce-a697-fc8036ca53e8.json and https://artists.proofprofile.net/proofs/artist/0cc0d23f-cfe8-49ce-a697-fc8036ca53e8.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 0xd24ccb1cae4b1c151522eea9672ddc36da13191b7e93e80b04f027fdfcbdfd97. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZ4JJ1821056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e1f79d5b74b2fa1b6d36a49b7de5fa4727a9d5a5e04a8bdcab5e9e74f5cb86. 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/QZ4JJ1821057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713ee952db661bc164eff79b2a4e19b4ecbcf1f5c221b0e1be4fa202f73ca651. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZ4JJ1821061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f2792aaf3d0b8da16392817c64bd040247cfd2fed32dc69d32fffd96c73949. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZL382047176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f924d93413d829604079fbeeef66590a54499e37d8ff709207b1426af619a3. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZL382047173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054d16d8dfc95fdc64f103d40c5f0b9f692709617287aad765412cb04dccb107. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZL382047179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d8ec52eb4b505b551ca2e15ced66d92f213f60044b08017ca0a62eca56dc72. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZL382047180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af6e7ca302e22932050d36838f0f0459875ffe30d414f1bbd36e534d389a2f4. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZNMU2168987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf49216b31d3d985a99bcb670eeceb7ac7a2096f5d96deb924b57dcc0f7d5da8. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USWD12322845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cfcf021ce931ffcb112d99f1cd2dcba189005bb323e1721d910adc72d7f7a4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USUM72400707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f2cfcf9118da46a0e7dced6fa43c6301adc5d2487cf33d703486c40b653fd7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USUM72403830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb025704835afac52035f79c0270cb715608561df58f7f2ff8a6dea6909f9d1ee. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USUM72407336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4305f3a1d53e9a287d336d8d17d8c638efc6bd1367506287ea4da1911ef813f5. 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/USUM72407666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0f8243bea1e9e2694e5f18e4630a5fd6d243738ce5c372c14d4761f35ce505. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USUM72407302.
WalkOnBy (feat. Earl Sweatshirt & Rae Khalil)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf926136167b94d46cfe35e531869a3996b09a6adda5a6f8e225ad79f098d0c8d. 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/US2S72400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f70306fdc3a49b93c90b1e553885e0f47999371e54bd355bc14b9feaab061f8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US2S72400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fff8995064e20cd8c8e1df94586f34104d1795171a32a163bfd4143c9cfd77. 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/GBDNH2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ff2ca252ff9a60ebf82149797f187d0d60eecb8d42787950f5e57435b93f87. 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/QMB622401608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991e165947fd4b66a19fe2bdde2e58ca5ace8c4e181a5e69e08bcc8b098a69be. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB45A2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991e165947fd4b66a19fe2bdde2e58ca5ace8c4e181a5e69e08bcc8b098a69be. 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/GB45A2300218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2aa783d28a35380e290115fc4e8ec750ddaafaf0b2653ba6f294d154cc8d8. 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/GBDNH2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6a1b63780df056e76cf75c48e20e5c5cfcd2e5e51287b4ccf8319973e8dce2. 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/QZMEM2022917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2aa783d28a35380e290115fc4e8ec750ddaafaf0b2653ba6f294d154cc8d8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBDNH2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fff8995064e20cd8c8e1df94586f34104d1795171a32a163bfd4143c9cfd77. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBDNH2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa878cae8734fc96dc8ed76759e777dd0d371c3a2f5309dbfb0b665a83724be13. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMFME2151774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e01166414771b291cbe8c5777407a7462bcacd822bc12d8b36bc08971d2092. 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/QMB622300803.
Alto (feat. Devin the Dude & Rae Khalil)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa878cae8734fc96dc8ed76759e777dd0d371c3a2f5309dbfb0b665a83724be13. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME2151774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa878cae8734fc96dc8ed76759e777dd0d371c3a2f5309dbfb0b665a83724be13. 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/QMFME2151774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50539dc37f3682a0a47df5542ea88248613c8898850b5702bda54421e67b8be0. 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/FRIDO2414078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6a8840179bd1d285d819d69557ea949c859469ce325be0e804fdbbef5c4dae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLX5C2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0016e7c524fd0708719ef3b7f4c8e778b6ec28fe6e5ceb890a8cc5332e338ae4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLX5C2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50539dc37f3682a0a47df5542ea88248613c8898850b5702bda54421e67b8be0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRIDO2414078.