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 0x24759bc26461c12edb341360c36eca075e17352e1b3588685fa97d8df6efb3ea. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f2a6c3d-b0a0-425a-b734-7aaa14f58cca.json and https://artists.proofprofile.net/proofs/artist/2f2a6c3d-b0a0-425a-b734-7aaa14f58cca.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 0x2b219b0d067534541d3b7158f9c41a44803058730ccab0fe4f6e864bcac046ca. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GXBAV2253718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8645fdcc202f901e807a878bdaa43cf0bf84c5cac47b1c313baf6b1e7ad69979. 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/GXBAV2253722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac2097415d841ca872b988c43075b98931a75051b3625f871deab9001b1196a. 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/GXBAV2253721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37af4b6c286ef7d905bf70938a617aa3252694a10fdb8d636c0e1a408cbbbf74. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GXBAV2253716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838a9db910d6a5c5e7003712dfad33e7cf040780f909e6c442aea3d0a519e475. 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/GXBAV2253720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd06342442513b3b0677df4710aed953ce10c66a31196976f18185461e3d820. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GXBAV2253717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc8fe58e3caaf6ee63f73ea91e4af84a6ec3c2ba97a1c8bafe652ff57ad0e33. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GXBAV2253723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a422b6729fbe2343994f7c6ba80a217836bcf4e0346061588d5ae3747af322. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GXBAV2253719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f18e99749c6a38ae79a2dd980f1124d1e6210997936486108498f3f1cd85317. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/GXBAV2253727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf923277c608ede2eb65f6c852c17096f2296fcfc66ca8809a86c3b5edb524ba7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GXBAV2253730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eb649c96e96538b77900dc0bb6c986f00d8bc921a0367670e50fe033aa88bb. 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/GXBAV2253729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfa2db6c662aa0e19695b51dac42b2a19e26e3170ebb265ec6746b299f4057f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GXBAV2253728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ee70c3bdd18d2d5ad9b16b60f13926b022ff4b2161dc848deda06a55f0a3bb. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GXBAV2253725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26f9cb62cb5b80947abe323c3e9087283714c8175cfbe785b5cc7be8d49dd11. 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/GXBAV2253733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7855ed1fea0a88a81c883cece4cb4aebbac259c425064507032b5e32e657ab. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXBAV2253732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e74740826a0db9c452363b34bc26b4cc0c90a02aeb772e230c1efbcf5ed85b. 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/GXBAV2253726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbcbb5e0c4ff255658954b09a061a85c42c9fd5ad0025996fe2cb88c2f9b44e. 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/GXBAV2253731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb737e982f0893db454b5bb51e44737b16c903b0fcbcf5f0dae6b2e994d9c0b6c. 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/GXBAV2253735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89910a9fbedb74132749be9b638520acb0c9db5ec82d6ef55c1af49ec3e7ff32. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXBAV2253734.