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 0x9206229be98024cc63151287f26222d3856eb4e89b02911a8c460caff203c130. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfe4fcd3-ba45-4684-a577-95ef47d0adc8.json and https://artists.proofprofile.net/proofs/artist/dfe4fcd3-ba45-4684-a577-95ef47d0adc8.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 0x4ed56e7572f8be2db404b2d80b00768e87c15ca420f3274bd53e8983bc2a9828. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GX53U2448100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700ddbbd130d54d1968bea90063c35262477f710687eff43cbe8343a0f085d32. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/GX53U2458983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9430f68621469d8634010ab05fbdf8dc49142fabdd0e97b3ff7b96e4086d5ac8. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/GX53U2485997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d7c88f9fc207e95090d0a2a20b490807004d122122623c616baae6582296d0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GXF9Q2463142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8937dd32970a2959dfef81aae1e60660ba342e0f9a3317900e640ba6c6965db5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:55:54Z), 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/GXF9Q2566670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7fce736c9b276e5e1bfe4cbde9a6c3d6d5292261b29c2117fd70b6ae97e23f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:48:23Z), 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/GXF9Q2591036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df04765b187132bcb6b7c5803ae9e073badb2e392ffcae8df3066afcef73eb3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:22Z), 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/UKXN22511301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18de9b09f57c43ac8e5590be53a92e1a5611fb5bba4de7c1302674d4c5ba9d0c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKXN22514588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3268bccf24e90571da467968347d87d1a0d520ee473686ee0ece21da4d431c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GBMA22592670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20fa46789ed385571758713f78db9fce70232e5aa0578ead2b8dacbb5fe0e8a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:35:02Z), 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/UKXN22520654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3dc925af51ad41148b496b5ceedac5da6e67ec9fbb39ec8beff7ad08087471. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:09:57Z), 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/UKXN22523854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0cb84e00e2442d4e213488196eaad69438f85bcdbe73e4c067bc4ffc2949b3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:44:59Z), 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/UKXN22532926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac1957a3c02f53194d4a1d0befdc98cfaf1ca9515934190a58810a87e7a8c4b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:18Z), 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/UKXN22546616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde874d8cf726a11d3b63250f87140c1bb6d724231cef3fe7a2b2bcf8267e273d. 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/GBMA22589686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa437516683e2878e7906a69912ebaf7e31367644a708f7cee9e83daabc2ba275. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:46:51Z), 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/UKXN22563957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96323147d92bfb781698b345e8eb511e5488f8ed8ca19ceba8d9a5da4bc7bbe9. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GBMA22584835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a8fed741297d2d2e9514d444513ef01d6846782a129bf14930864ccad8f230. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UKXN22567880.