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 0xc6f4069f4d73035912028543ea496afa8d05e006f8cf991542c6b298f0a68b58. 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/31345fb3-a67c-47a2-b743-991ba8438319.json and https://artists.proofprofile.net/proofs/artist/31345fb3-a67c-47a2-b743-991ba8438319.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 0x42dd60c278d713b0869f2d02b8db95544640dc124036b01cb75fc9b995619df5. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/GB5P51800310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c794ea71a26345d3442650bbd66bba7615359d9673657259ea7ba02ddf827cf. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GB5P51800334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6438c0236f23cc66293961927845a377acff117b5b2fc90fcc131d940fa71dd. 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/GB5P51800316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12a94f3f49b7fd7b1fecc8acfdb5be7cf53f42b937c8d9921bbfb75446c6615. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GB5P51800319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1e29a5a32562a0aca5c9a0564f1887647e9839162b464e6fb6f892b2baaa44. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM24S2006476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb557e94857fe7f956c7332a841cd88911670943ef76d9782f39d6d93e41ab05b. 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/FR59R2158433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703f6e63004ab31c67f9b422efa24128090dd2acc20baf559f17ed8a9bb8955c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FR59R2158434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040e6c29225652bf229fbb6c229145ff8566f7a98e0a3b9c626bf7e1aab37424. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR59R2158435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43adf04d079f4bde463cebaadc609e25a5e5b1abc7e6656d2a21c60297d25ec. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR59R2158441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf3e37bd26dd80d06041b2522ad8e4aecb7487349b2637d97b9bc4ad2829358. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GB5P52200414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c791f98f917120e7ce169e0624c542d024895ca8644d44f872501c97c03d682. 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/GB5P52200415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dab8773bb96fa1fcf129450b5a52bc64603b8047b73ebc54dd1fa53bffb6bd4. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GB5P52200417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fb385e6c44d85fa9dc28cc8f5dd519c0a959046c834c99e81323850105e98e. 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/GB5P52200418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9bd532b835326086425c315b280d86cc0cd47aaa0c79ca08af0038264d5919. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GB5P52200419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0b8deab766afcd9adc94033c0eac624a52cf859b9bd80802a535b7711e7878. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/GB5P52200420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1154fe8a8671eb7d889c1c9cf4e4690c2ae8502eab2d778c0930e9636dca00. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GB5P52200421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f551e820ed51a989199e02b73e165c09e0409e3e6884977b35b33bbc74377c0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GB5P52200422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd80ef5274cfcdf9864ce1aac7532e9973cd7842fa51bfa4dcfaed9e4f7b284d. 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/TCAHA2377051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b49dea6f0ae7861167078489eff663fbc21f73538c441e274c38a2f98e7c9fe. 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/TCAHA2377061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fd7ede017e38e2d482bac90bcd5db12e6b20a0a6aef5ac411b63e103bdc2dc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAHA2377064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aef520b36d66837893958a1128dea121487298e5decf264ab9ea9e5a11589fc. 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/TCAHA2377070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668be6be0224ef5227b9ad18e28b5f3c63dc27d7be4a11aa57f58ed55bfd0577. 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/TCAHA2377087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc53495092e0b51a78a8983ea02ac2a90606ef69ef6c4e5531af3f203674c00d. 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/TCAHA2379293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9fd096407f6e8cfd0eb6408b5b81f94284c6e5c60abda57fe12bf97fe97e82. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/TCAHA2379297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee5f5585124c19d5672353c789d972a6f8d9409d9345bf4738ae4c3c5efce83. 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/TCAHA2379303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911aaf6b60b6a88513cc7747633215561ac3b0143dbaf2ed81cf3133794fad27. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAHA2379721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4128d84aa0a18749b44564130b518e7227f9b1d741b40f37d1c37d3f494bdfc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAHA2379722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf80d3415ace989c10fb0b311d055dd5f234c7e61f72841caa6c311a37218c0. 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/QM24S1925096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3759bec51dfd8644024e7241887fe3dfa4207cfc22f90f15e77e37a1f4ebfe. 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/QM24S1925101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a8071820fd3eabcca03af48cdc294713ec528c2c34638ae639246ebdec6169. 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/GB5P51800369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51955020cca8147f887188acdcbd159e3af36ef6447c5e565faff67d971e4420. 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/GB5P51800311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73036090606c71245473635cd2467e0c9a87801c966a372a3936b1194180b7cd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USA2P1945712.