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 0xc22ad804624d52072259e067a0925362a01cf79d8449939c00f7d4f5a2677cf2. 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/39877661-91b6-4cdc-8e9d-002dfd881959.json and https://artists.proofprofile.net/proofs/artist/39877661-91b6-4cdc-8e9d-002dfd881959.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 0x8ed9ae3ea67a68066a902fe37632e02c9fd81840f3b141284faac609b305fc75. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA6D21700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d01f764a61daee06a71ec81781beef0e7ac23358ec1521384017a16a592c1f4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA6D21700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a38e54b1bee7c42d8786b8c9be2a834d4c6a71c78d6bad48bcb47a5e1592f40. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA6D21700079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02d0db916f3fe171a89ba96f75e75eabe4959711619e3bc82a5f61f9b417e1f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA6D21700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44577f3389bde29472c5b2939b8dc9b1b520986e5336b9db0d76d4b4c6a9af16. 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/QM2PV1719429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec748a758de5023b2f31eefbb4b164ead46f5c7b653fc4b71b2b57d4c265a47. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM2PV1719430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f9185d661482f593a1621e17ecc84d5c8d4173b10e562b141aa549263af996. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM2PV1798284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d5564bbd3a762f6c4b1914db01626cb1d8e39365cc94d1cabd4ebe7e4e0624. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM42K1607512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ab6ced90c5321ba9018a21ce962befbfa40fbda07e635df8e264c34bd9b3d0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA6D21800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275a5d91b53ab29a49cc02feb9b6e9654782af73c5128765c1935ee71279d38d. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/CA6D21800390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b6286f12ac171ac314a19aa16a9cdced7b880cda88fdcfafc99474919c20fa. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CA6D21900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd10fe55c21f5f709469b312cd5a7246bfa266be11a5096e197da5b1fff67418. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA6D21900439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7705b44ff5c8d868334b0303cffafe41aceb2978f49e4cb910a89d4cc975de86. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA6D22000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f3fe78db6f7e0eaf3643fda95cbce8dec5830f564342d71997d3bc1e577f89. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SE6A92161866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dbbe8b686beea55981586a46bf26b8e1d1c924f8557ba917aaf40ea0f7557d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE6A92161868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c79b202527b02691596176531fa91914980e965de184478aadf84959dae3d1. 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/SE6XW2108225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49289c0de453983ac03b0b5b6aa6f13fd0d1a3e79cd85be0425adb3e9f6697a2. 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/SE6XW2167792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89faf0b5bc19509cefce087de86a5f76b8e916dc931b7d586df2581e4cb4aa86. 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/SE6XW2167793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3926099496777fee5630b4b788d9c62ccf54b7f07ab04333fc1e5ae34d6e3a36. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P1942687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a5131da2659beedeccc507daf37949516b57abe65cb36a626075a9bb66cf22. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLRD51632411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4264d6f8e679c4008b8cee9d1ff9bec80ec55bfdd628a6670aa23e4c30ad8fe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD51632237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be31c24df91bdab78eb5f30da99c3bd1ad068e4f5c81ed115412dafd0d46dbc. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/CA6D21900290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d01f764a61daee06a71ec81781beef0e7ac23358ec1521384017a16a592c1f4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA6D21700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d01f764a61daee06a71ec81781beef0e7ac23358ec1521384017a16a592c1f4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA6D21700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e89da2ebab9c1e298b132b4c2481ab47399e2db2c44b8b6b821557fd153682f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA6D22000194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7705b44ff5c8d868334b0303cffafe41aceb2978f49e4cb910a89d4cc975de86. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA6D22000407.