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 0x6e1bf0cd96db61a944c03c37544dbad440ec3906332685617c041660a05dcb02. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74f9cf33-865e-45b2-bf67-5c8eac2225dc.json and https://artists.proofprofile.net/proofs/artist/74f9cf33-865e-45b2-bf67-5c8eac2225dc.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 0x5b251c6ceb34ad87d8d55a55958ffbfdc2f3435230850ae77c990ed1df6c27fb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TR1780902671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f15f632223dbf9e206de8d538a329eb64586822321f9ca0dc44146793bbc15. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TR1780902672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b5b74d820a1a42543e33f38a46394235ba6e15cdc98c710212b0549b2b194a. 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/TR1780905012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5111f25b1b4d0a10853a5249e995b0c7b62670f2e1c78d0c08c0f7e09403db9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TR1780905013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3e9af1dacc19aca4c3fd62850d86a1603413f0ff30db12f19d5b44a4be2e2a. 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/TR1780905014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518e1e933590be799b271dfce4169f9ec8c8f8449c841b48ed6b130248eca496. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR1780905017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cb1f15fabd37c6816cb1c11391ac2b3dbf45ff91fbde8b6a40037a79a65c71. 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/TR1780905021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e6cdcdd2eb83f8b960355ac5549fa3360554517fbac888448f097a6dae7b68. 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/TR1780903209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9725efe6df0365d9627b9b261582176d59c0f06163afba5053bff24095e3a7. 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/TR1780903350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80275d7b65d856e1d4825a9aa2b533a7b905af298ce38b37436128e08e43b88. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TR1780904431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e00e8413347e9a1b1598900b861990a1b8e3abac6fd4a618c0be970d8a89abc. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TR1780905087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59550c4570c3e5a207fb528c66ff6e6378ba97e5cc51ba985e8ef567a73133eb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR2X41454580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd598a11b7a4c54000528242220a61eedc0c4a87c7269970db6240821a78706b5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TR1780903241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21ce74186315fbee283cedb835d9aa522f68fdcc5b7576e00d9c53a279942fd. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FR2X41454566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb5043874933ad804ac122a992a06f8cf30d4408f98c256934158cd3ee87c87. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR2X41454569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9977a98955e7ccaaedecfadb479a9fcc584ff74a0fd3227ee59329e3c1b09518. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR2X41454570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41044183950e0cdb883d177bbee08607a232ee7591001a34b5763967fae59baf. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR2X41454571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfaa4611489beb14d1a18f19df2e2f5538637ca002d14698d88fb2d484e52bb. 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/FR2X41454573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aaa49213b69ec1d0a743d29c5ef4f97fdd9162c4be8a53de6049b8fc8463cb. 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/FR2X41454574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b559f1c3f055f4d6bf3a4b3527b4908124affd533cde55f4627382bf0b31c2a. 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/TR3951400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cf4479c1035aad224b3fe6035dd89c4b124bb7a86495a0cfb7a3b12f1d6a39. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/TR3951400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b925bc3775d497a5d90e7252b32b365e48f21ef917a822764d8bbb8e6596e1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TR3951400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefb3f7fdfc915e11f9e8d3854196ee3e14f3947532abf5567effc1251c41e91. 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/TR3951400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2308601dbf7987217fa4997518573334eaa8110acc41552b5578bca06257835. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TR3951400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d4bb9b8e25a76fead56ebd7ced1017d4fed7314f0b5153af985a20c7faf650. 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/TR9891300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8051c84d21b0d0b0dbf757869a0599c2fff5ceed7edf376c5446a69bae83c9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TRAVB1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e57ab88aaad02d86d2cb3bbb8c9d3da7f47837594646f6d60ea08cbf773620e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TRAVB1800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb10244af9557cedbb85e11ba144b260a98f7aaba94f8c82651414e442348d4. 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/TRAVB1800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55354a0e9ad6f2062eaa0707f099b6368638e1053b8047052632b3678dc4025b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TRAVB1800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cecb3c386e8b1d658cd09244e3c2e10b607cf8240fab2ab5f391059f2b0ba7. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/TRAVB1800059.
Serenin (From The Black Sea To The Lıgurıan Sea)