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 0xf26b1ec3ff5a6ecffaa7b3c2a87e9a315227ffa49dfb5cb54c154a916653fc0a. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54f0a9f5-557e-4ddd-b94f-cbdf4cc5e80b.json and https://artists.proofprofile.net/proofs/artist/54f0a9f5-557e-4ddd-b94f-cbdf4cc5e80b.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 0x03b10004f21a92f5b11dd837f115512a8b459ffe97b4b05d7c9ce99b4b44fc36. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZNWU2568025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07342e65644b43d85ad99daf76a550b0d9f28ed887eeddd50687b8e0f23836ba. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:29Z), 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/QZNWU2568021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f22b9907bca7a8c913cfabfce59deaf9845c03ca0511536866c80749f3f33b. 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/QZNWV2526389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3dac79659edd3e2a8e3dfe290b3a0def24eb9e9929e3bc866fbe6fc596ca0d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWV2552840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d20a589a153776a75b2cc7aae1df7952b9dd501c814896adb79bf30ad2bbe8c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:24:31Z), 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/QZNWV2554989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaceae3ffb00b2912e00bf03b8ba229951c026ce0dbe0100a461fc89e889e0fd. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:37:28Z), 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/QZNWV2554994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd835cae5711a48195444806fba0fecfd6c091b7ffb323667013e67aca1423ddd. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZNWY2524099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178f4590990a63bb7fb6f9b014fa5025166adbf805754b3b04f1c1df6001cd39. 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/QZNWY2524102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc54da25d0f56f6f1fafe020bc448e53d03dea0ed9c4e9801e4880a3adadab3. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:08:40Z), 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/QZNWY2524101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4469106111716a550a11e023bac8f44da0e3c3688ea9d4ec9fd1754f46c177. 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/QZNWY2522405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf4dc46cdcff1d3962c2a7d4212d8817f41068c8a413b15515ce2e76fd4ad63. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:26:46Z), 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/QZNWY2524104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8663cd1b5cec6262fdea2c2b3144b103e01da25c4612993b535922a204778060. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:03:29Z), 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/QZPLS2521700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f3064fbfe4bc17df445470d79d1a7974cf915eee1841e11b3540d21f0fc7d3. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:33:18Z), 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/QZPLS2521703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38984d9a3280c15d82f37bded6b6003161b78f3d97e444737def9d4b36c6758. 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/QZPLS2521709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea6ad191426e03a4e72b5dcff7f9a4e24389beb2b0338f4d7f96a522db1c257. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:21Z), 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/QZPLS2521706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3d8f193b9a4a592bb87269edbb4526ab7cc9ad00c5e95a6d49b4ae3d9b9461. 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/QZTB42572179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec8e3dffb35ab234143990c0e0ddc95b73129597c4c34012101b0fa283eddee. 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/QZZ7U2569385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd4a2c3e75aaf4daaf488e518340e9379c9deb17d6626a3ae85f6b719b3329d. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZZ7U2572633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754696fde1d9c45a2d128c3146bbb6ec38722886ede9840ae9caaf23fdc8dab0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3EY2579165.