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 0x315c6bc09f6866b469c23459b3e855447b6f0e26f25873d97314a4b64b08cff8. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d94ed2de-e3e2-4f9f-81e2-d53104d97e61.json and https://artists.proofprofile.net/proofs/artist/d94ed2de-e3e2-4f9f-81e2-d53104d97e61.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 0xc3331ea67271bc169ca629ce9f5479c6a1e0ba8fc772ee6c40885753c51590ff. 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/DEZN82418568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860781975970829169153e4a9f07b8949d5dc5294a1f4a58a5ab8ae532e94d19. 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/DEZN82418481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5114a0fdd9f1852cd4860870c4ca7703c85af5b4e27fbb46c1d19718ef7b0431. 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/DEZN82418478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c12fddea0b4ec3988323304bc9820ab07258cc2a2c107d1932eff5af296fc1. 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/DEZN82418480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f3bfbb9796b0ac012d99f76cdb2a4f0eb29bcbcb5e7df984ad4e35f4eac1b3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/DEZN82418586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab4d28c9f9b1476bdc33b61b7562048428e23a7cab0e064c1a0c0b41cc48101. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/DEZN82418557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7be0dd87415f8e3547efcf6e9189c4aee47c037c1cd296873e3790b77271da. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEZN82418554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f6cbe2f2847acb4d9f136d51b9377bc56db1d9d4eea090119e13254d23de04. 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/DEZN82418584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1472165339f304563abe8ddc470bbadbdc67d60c366c77fdbe226e8761f68c7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/DEZN82418471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe287100f7b3b60a35ca2be182dff38e7151ddd677121be738240ddac79ab24fe. 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/DEZN82418587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663f0862b6d578b74ad92323c62784a99d442ade2de3d2ce4b2186706f6e7e8a. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEZN82418583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9c780ff0900fc40a9c8285b7ac644776817c357739a77831c293863d999f07. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/DEZN82418479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a05f4bfcfa955ada62e264dc0950dc881afdb32aac6d2801124c17d5a3041b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEZN82418485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afbe8e3d5fcd0798b7f7376be3cf9fcf1814b30d17ea39c5e89c63823655f58. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZN82418475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dc7522b486f894ede33197831f6598d18b77380348a1b6ae66b90de59415d2. 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/DEZN82418556.