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 0x14eedb5e16136f3a4af64325056aae0997a2d8ddfdcb4a184aaf826142ef5547. 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/db2e846f-7506-491c-9c34-3623090bb1c5.json and https://artists.proofprofile.net/proofs/artist/db2e846f-7506-491c-9c34-3623090bb1c5.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 0x50c63e4736c02282c57dac8095cfd2fadb3330ee03979feacfc4c825b111d127. 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/QZFZ32110935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d529262a28fe5bfd236ff09b6b99610b84094d33ca03c97efba1730076309ac. 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/QZFZ32121303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d70cb0f4c5f80db3caeccb4b253c23a10d88d3d32b9908e58a83e3b4a2d1ed0. 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/QZJG51724398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3cf0f62d91580da22f9d25706583f4d056be880e0132b5a130b512c7d40684. 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/QZNMX2175676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd40330605b19a29760cf3c1b9e1a6af2bfb2efbd872817946cc0b5eda0fc695. 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/QZNB82268468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550407924746b6963fb6066ae99f6b31ce6073859d4fd7fef24cf73a01e93669. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZNB82268470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590f31143ab00c978b540f5c5418c75a0b15b69b89c341c268fdd373438249db. 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/QZDA82544568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c7894f3743d1e78df3a726811bd85efa77c7afd2f2f24a0fc3297671892680. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNMZ2268556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf851cb7be11d41722771d9bdbf277aa02d9118e3f5f7d6320f38f5b2dfa6e1bd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNMZ2321730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d2a69a7f1b97b3ad085b4097afce317252ec1b07e7e3176e10ea221e5b471c. 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/QZNMZ2321731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b70d4e70b423fb3511488efd09ee9a459bd535286778331a3158968180bf42. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNMZ2321732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13647e024d0c8afc222abbc0ee5128102eeffe582b28b4508b82c75d1d3ac44. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZNMZ2321733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53d8fa524fd70c9e3a9a2759dbf60f3b2243f39265d040cbd9432eacbef63bf. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNMZ2321734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c45e43dfb4ac34a00f2317ef17b4e37dbf576e44d10df3ef7fd431fd4f8460. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNMZ2321737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714794813414176b1672b405c8ce53de19fb8e1f712ff8d0d8d2cf5e3545fa80. 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/QZL382319256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4274a48da52459a4f8c88e4191495502da30d2531446ae71397c74422f62fc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZL382319257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416197c120408707f4f578e0740bdb2a864d72ebddeab5f487b57400d6183032. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZL382319248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3611ac9af8093283e21d23dc27f18e998c6a715619ba072c21853ef5e74e41f4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZL382319258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7f3e6c22d3b091a8e8fa751b650735d75496259cedd0304559782d4ae28e53. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QZNMT2336625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2f34577a485fb0dec49f7d7839cc0c078326575f51b6696510fbe6daca21e5. 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/QZNMT2336626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88fe2dab6bb786527bd04af781f32f245f2659b8c3d8f10403702a958467cdd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNMT2336627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1124bc01079622f2af6c8d157ffb150de91c25e9cae29c2b25757d2b189cf461. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNMT2336629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2462ef8a3651f996fc4ab9f2f1135d0caf5e67fae2d446d954a6a9d9dfec1583. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/QZNMT2336630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f32c30574e86d56320caa09d436e3353b2797c19540677753998c51a3a6a4e2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNMT2336633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84082c44c45c3a236657bb5dbdad20f58284351cf053e1dfe841cacbf638bf41. 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/QZJG52285220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952a6d2f5dcb6420ca7d029a46c318cb58bf8869e16dc4f3c099b7c06745bcbc. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZMEV2465900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20eec9bd7c35e4df50ca8140246d657a4c02126d1048bbbdfd5da410f296d132. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZNB82493250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe685c747c3b6dea0c9be9119a60c28311ce2dee62722f739d3be5d35a357a8c0. 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/QZNMY2452429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d40bde9329e62ca2c83a1f8181b6711ae6037d04a8e701d88054386a1c32ca. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USLD91782124.