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 0xb3b799081392af1ebb8648fbebbc547414279cfb30cc0bb7548cf9df396cf5a1. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99a7969e-dd82-4bab-babc-0aa93f173211.json and https://artists.proofprofile.net/proofs/artist/99a7969e-dd82-4bab-babc-0aa93f173211.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 0x7c7b3a3ac945f9dbd15929b7d010c0d12a23c3c57083cfb79f58398c15103b52. 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/BRACT1607146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea2b21c20cee40b2d699941cec43bf9a0b78a674af09ad02d6f43481fedc8bf. 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/BRACT1607147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42b4ec322044cedd02dae75fc1f8acfd4448a276cc8f7726fd5c74c785ed32a. 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/BRACT1607148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaf20621e5808a92ded3c2e554aebe7b136cb260be812c61536be45e9f99b96. 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/BRACT1607149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff44b0cd125cc6557c4a60d1a4ad049092e8b52aa1571e5ed33f49e674b1138e. 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/BRACT1607150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8010207885a1cf3a1d29f557e23f0fee40546dbcc9f538fb82207d36117da441. 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/BRACT1607151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfe48d203872ccb35ccce8635e88e0c2e8d49a489c112f581762c4531944059. 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/BRACT1607152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9b2088647701841cd950d833992dffdc8737bc2330ab03758715c05dc33a44. 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/BRACT1607153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d51a3d52dc875cf6f3740496e6f662fb7534cc629b73e70506830f6302c6d0a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRACT1607154.
Pot-Pourri: Não Deixe a Peteca Cair / Tá Na Hora / Não Diga Não
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb353208267aefdd9e33d89c2f734b06d8090d1a241fb49a6d010fcb031d05f7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRACT1607155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449e5bc4e0926e0a084186ce02eb8ea90eb7df81dc119e3f373ee9ef87c0dd18. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BRACT1607156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2be8f78d3c8dbcaa1a3d9a1f9f3dbe67f6030cc9606c7f45754b1e103cd694. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BRACT1607157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc9d96f41ef8cf459e2a08bab293eaa2a4e2264c9e46dab9dcedc78ff39f0c8. 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/BRACT1604583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20e21d60afe7bb80601975a64d8cd5b9fd22d03ad53321f60233b9b7df1a799. 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/BRACT1604584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7f0bde75468cefcbbc9164ef580dcd50b25605e33423a5b3edee6462d69480. 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/BRACT1604585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ba3c78a3145505d3a4e75b16f7ab032ec60d489792c9d8c1c815520fecae36. 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/BRACT1604586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec55ad88439a99f9522e20b8c921eb19334e46531f2a827bb224c69641b000e3. 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/BRACT1604587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731ced2c89a5c2638452514eca6e7a3d4bb227734c8d2b6086d5eeee4a28faa6. 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/BRACT1604588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c021707f22b55e4caef3a695e08f79f43e1dea6dcce9adfec61b1b880fb490. 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/BRACT1604589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7659511e1665d5771860a33ece8f9887e069d1d8433e88139284eab039704e3. 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/BRACT1604590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c17875f3fe4402c21d75914e5dbba5e2c9c352dc05cffb71aa948526be8e8e. 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/BRACT1604591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2ebb99ede7ca50e96431d95284a821ba790abe8861fa4beed019a37b584cdd. 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/BRACT1604592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4239fd6aa8fecdeeabcfead8bcfe3ba59ee903ed44ae26447b95c9c019ce939. 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/BRACT1604593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae8b2e37a03e3bbbe110eb38ff66f2cd1d5d299e15790ce22e04bfa3a09a72b. 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/BRACT1604594.