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 0x9289c400cacadf35f331318d6bbd0def6274eb79adfa32b2e85df2f7e66445d5. 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/44bc15e7-3867-4600-ade1-c4f08512f8bc.json and https://artists.proofprofile.net/proofs/artist/44bc15e7-3867-4600-ade1-c4f08512f8bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xdc17a0380356452ac9ac4a3b2315f2762ba67637fd30bde1bb2b0a4fb83b91d1. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/US7VG1604823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d04142c5a5bf834fb4b7e41c2e1e237100fdc78e6ff81db7a77a6cec19a4a34. 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/US7VG1604824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeffd464af199191561be7bfba871fc0e0d8d09209df0a673959c0b0d866431. 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/US7VG1604825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc72ccb549239ec1fb9668b87046a5ca209cdfdbc3cd4ee29df2946a4cf434b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US7VG1604826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8c53a8cf18c36a314d0996c25c4b986333179e7e0bc2ecbc6bc453b207f532. 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/US7VG1604827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1893d5380435a25914ca20b6dbc7f91512ea7f5ab77b445da5b45d2b63e2ee09. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US7VG1604828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc094478472d5933a5001f9d1df25945980dd2b4459528f3a6cc945d20601fd01. 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/US7VG1604829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f231a07100f741b241a405e03b1ab276ca04c071884cd48fbcd202b895e5b2b. 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/US7VG1604832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524fa1c7c19462e4afe5a187c231ec33f26d421ddb414e1b1978bb4c55f6e572. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/US7VG1604834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7e81b82c1db691930d34227a27b48f2519909b29448365df0382dffe3bb833. 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/US7VG1604835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d32eaaa45de90def0d448f94e039c6f5055eba83c03b184fe6d01a36e31769. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US7VG1604812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73671a1547f63e0bce92630c94f0b6ea9ad7f4a20a5fbcb83c4627d72095a39d. 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/US7VG1604819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfec43be342bafed5da27ca1808d2fb303536814ece9ef592a3f2051b53bbbb8. 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/US7VG1604891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1403b4f56b42ceeedf9c116467fc7e67fcc32ad6c419062893dbdfd43945d33c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/US7VG1604892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1250397fb6f9341e835af47c744d090a111dd7611d6a3f35aa63c9118455af28. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/US7VG1604841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff9a712e802b3c30ce986584cc13e0599812fd245086593f968e2fa40518461. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/US7VG1604894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93165602bf1ee951e8dae29bf5c2e50fb2f76cf3ae1cd74b13d204210cb58bfa. 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/US7VG1604898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154ba3dd6a8d315f36617cc459f8793e52486051c64183615965cc2be938f38c. 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/QZ5AB1631225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a221d23d64c498e4ac757175772463160ec3e19bc48c0af8dd4aafb66e715b. 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/US7VG1727940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16e833766d895b01c07adec1099ef0965bc1b0d667fd3aba922f2a1a4fcb8ae. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/US7VG1785783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adb3158da31b2abb0a862eb2872309f7e332ad9ec8d023ccd4faf22d85d83c3. 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/QZ5AB2018890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57c3710d10785cc544a4a58864f0d9e8a523bc0ee40a886e068742a1fe2d814. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/US7VG1974185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36a42fd1256cef36571b3f6c712cf5c302ac779483a87fe1e421f229dcd9186. 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/QZHZ52085855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35750e007da0c1758e9032180adc7741ba09dd49a8777f644d3bbfc45bf3314d. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZHZ62000870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ae9e8db540a1f06656e725ce8aa8cfdc27961443dcc78c93bfa1a5a2a21c9. 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/BC1XO2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2246e1022edf5edcc7bec3b890b802bf9e858c397acef3ed2e8e585137afc8. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BC1XO2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0cb65fdb73a577e845c6e5cf4206507d96e6ccd9c2eb824205dec641c36406. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BC1XO2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1620f89d57938dc3b9b80d2490c814389f3c0669f48a43f7129d93da3d9dbdcf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNJX2342708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bad36bc822a5cfeebc3e0fa340a1610673a2640722f42c1a05387e38597ae2. 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/BC1XO2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf526428c9d7e63eb91476fad0092fc175345bc185f5a9141582221c86b97fe76. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BC1XO2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca4ed756687b65709bb9ce9b3f606b7dc056be3ea137b02d7dab6465da6731c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BCSMQ2500010.