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 0x3fd87c5f6d54e10964d5e4721573e129045f11ea7301b5475758b25e8178c101. 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/14707907-6403-4ee9-ae67-420737048a64.json and https://artists.proofprofile.net/proofs/artist/14707907-6403-4ee9-ae67-420737048a64.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ride Through the Battlefield (Bonus Tracks Version)
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 0x121252a9b394b2f7848ba70e006b25374c30dc07e3f5339a82b9a407df84df99. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEZ651701014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b1a3eba0b0e3865b9c27a16643d4a100218d4744764806efa66c3e19108d50. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZ651701015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc6c08d3191391b2577271b0a5f7be42a303becb2a4d0478d3933a4ba5d0df1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZ651701016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712d59b06bc6ae74d08d28be3073a85a9d4f30875c267c26bc5de455b9aa1ccf. 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/DEZ651701018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327c7f94db943aee3173542ca959d929715eaa75b9b618e78d5bfa5835e9f6fe. 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/DEZ651701019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e730e78bc0e6e382bd22d6b614080f95b55438798b3758c3318107b99ddbf22. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DEZ651701021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95373e5d16b8d9ef50e88797a2ecd8da86bcaaac11603e9fcce1f43cb0dfb8e7. 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/QM4TW1908623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d34d26a35d691d4f2d55bf0558a31abfc030c6397e7e61cd8ed2f2c285e5ad6. 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/QM4TW1908621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c433a4d5896d8962aaef5c493108128ae2ee4b2d1f5d834aca4b0ab279553da. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QM4TW1908625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca8b4c0df0fa089be4210176fdb1a7e537e3965d344d4a114e85cd7c406fc60. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QM4TW1908627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ad143b55fd04ca90977ed2a6d61b977b18a437c506322628339e70f102dec1. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM4TW1908628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c2a44006f02ba61f24ea88ce9e750aab3336e421378cbf724e922579e7f00a. 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/QM4TW1908624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb979fe55d203a6a5a01b96b504166cdea60f66425319a4bad778afc74991b0. 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/QM4TW1908626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94f01c097d4bcdf1411c0bd0d6b7b2ed8beba99d21161af475cb2b03a17277f. 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/QM4TW1908629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d38665eae537e0858c174b1168091e8c218f9cfd7ab458f18945de76c3820a. 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/QMDA72367617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191e6932d7b1f58a3a459105592c98ade79bae612264a24386fdeb9323363598. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMDA72367619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca679f3f21f2812443eae2b1f6e0867b8b1df169e806f890ec83f3887a086e4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMDA72367620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14ad133ff16931725abbc2e97bab0b8bfed51ded91a8efec642017a31db8a16. 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/QMDA72367621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fee226cca735f0abb300791db03d62a6fc6e2d4b43891a4f5326b05c8d92995. 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/QMDA72367622.