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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffec82ea5cefb459f9a50923f563f20a0012f510e378f1fdc6d3f49e19a29372. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ca540ed-4437-4c28-ad93-f28e270412f3.json and https://artists.proofprofile.net/proofs/artist/6ca540ed-4437-4c28-ad93-f28e270412f3.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ffd8ee1981004cf41400997049f1c19d986dd5be21ac066189de1b28113444. 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/QZDA62248680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c82331299301f3e5f81751ba0f51d3d2b5082707190d377dce0c195678972b. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZDA62248682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb28a59644f76bceeb4d34e2469be75552a146d64d900010a496ea5e8e4dfb8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZDA62248683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd80106fe59008f440750d29e5322b4cfd5ec8b33ff53435dc17a8e258f5308. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA62248684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9916bd10800af3c7bdaf1b0d27507044b204b566cdec2af926cb6d0a516d06. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:06Z), 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/QZK6N2288066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9a5f9f50df3aebe5a8414697335c4b28da9c8386126ea302234b3daabd62b4. 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/QZNWY2234191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c0fc056290af27826d31067278d1201e2d844edf0164e3e7dd9a08bbb31079. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZNWY2234192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aedb01447ac9bbb7d0d3bd7c1054f4fff8332dde23ca107d71288dd170eecc0. 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/QZTAU2265072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c68a6fb71cfa3c44ab337e62245001533890724bcc76bc3575f933e9ad5215. 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/QZTBB2269634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1d1c8e76d5d7a8ed88e414f956682dcfe693b360abfe66199e6449ca1878de. 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/FRX452324790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeab09570c7d98f43d1ed9f995a14cdbe82155ccc73695b59f8d1ec787458ed0. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:11:53Z), 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/FRX452324791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc5eae98c7e8a079c42792b3599e8b46d3ab89feaa49cc0c1221ac3e0f12c1d. 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/FRX452324793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f854f449e3aafd1705a48ba6548e1f97f44c9fd148e5de6f36512f5fe073a84. 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/FRX762392689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0dc353ed46776d2c36c30ce83491f68ce7ed18b26227c758c03655a82ca0c5. 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/DGA052399260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6fa1521a5d7c375af666a1b5affc6999fd58585d97a3f22704e37e69883ebc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFK2372400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b65990c75bde581c4e2db3a3f6da1573b0c9de25bc8f290b93d7c68004847b. 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/AEUM72400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bffaaff83263769931e8e89fd389bc2680c7db5dbe79d0b09cc96929f69f28. 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/AE2DY2500058.