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 0x3ecbe6b18e12ed1a740c2dd291e4021b7cde203e0a9310412eb4f75677a96be1. 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/7bed2853-55e0-4a1c-9e31-da4a0f45915d.json and https://artists.proofprofile.net/proofs/artist/7bed2853-55e0-4a1c-9e31-da4a0f45915d.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 0x8a4bb10ecb1c7ee4034159306807b76c4f16de275e33829acd5a7300d787368b. 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/QZAPG1753746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ab41d96b57d3ee8d2e9f0ec9209cc4b9937ce02dbf516723e365cece3c85ba. 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/QZAPG1753749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c15e3ab059ac5d8ece274b865dcdecb1e3f9ec629fac0f41b6ef7fd8aa36320. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZAPG1753750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b896f990bd0ed161d2b66996ef1c33847207b2afe6c3ab35943aabf1b087ec3. 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/QZWFP2377600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21793c099352d1d9d93fab50e7859f34d865c7de9774fdd48752a25323e2ab7a. 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/QZHN32307359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d752c224de44685fd814f447ad79d29cb7b34da1164adab45862b41adb72f05. 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/USLZJ1964918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c151600069b5f53dbf54b7ac94ce17fdabc9b695e8c100d45662409131d1d58. 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/QZES61904748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85f2d2f8c9d6f004dd71508c5091ac79efcf86024cc8daa94bfda5316b41afe. 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/QZDA71929956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50d7cb6b6eaa158e124f3ed8283cfaa74d1a23aa7b256f4711f3eb2f290264. 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/CA6D21800358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd852e3dc2338506f45774124c8e68860b9e5d138edf40ca71d170f8fcc3eba33. 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/QZBRF1846404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc85ac2056d7ec5f31f615edc2fa90ce940714a7b0697e8ae68639816a63555. 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/QMPKX1799862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e29dfcaeca9421084d86a3f43d643a057534400c26ad87cbdc4e2969c51c979. 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/QMPKX1799863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7eff9809e411a992d7853e3fc4435d63ce992786f2358dda05b8f863395f7d. 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/QMPKX1799864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f08727ea1f9e2d97952d0e259b94fae21882375e39e4589d789de14c82ffbd. 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/CA6D21800354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe706dc0e5c12495ead9cf4511da7f645adbfa84fc607f3bb4ce60b36c61aac. 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/CA6D21800357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7ca7590415c37d572509891636bebb5f26b683dbd10efe656af51c96434be8. 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/CA6D21800359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9df73ae7d9d1330037531acb7222ea49dd698f4e1a296ef7d650a6660cfb41. 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/CA6D21800355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50d7cb6b6eaa158e124f3ed8283cfaa74d1a23aa7b256f4711f3eb2f290264. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA6D21800358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1322398346478bb8e00fff1b11525f7ea1c1a0a48665a61cdbc969eac822dbf1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA6D21800356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff43c2a68cc242694c83c35e4241fa5617bcbab6e6d2b469c9892fe261cd8d9b. 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/QZHN52466704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbc398c18682d80299744c518bdf146d7f8eb89682a2abb97cb7b121d88368d. 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/QZDA62455935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4173b5d7965e66a1ec3f8241749c10db7d3e460407a11e71da28f4a992d510. 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/QZES92470370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d107339a2ed8a5f6f422d34d028a81678584f55eaab12ebeb47d76a5a38f11b. 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/QZFZ32419833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962a3b557d0e5dfb00d44fd1e69f76307878216355dc311a9ec88062a3fc8437. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFQ2301480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0c062fe2e73f6ab8107952c97c54ee8465659d3ec725fe1b8cddb3fcd72315. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES52491000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7963b2fa11a3ee86591ae7b509a62bdbdf4571a7abb8b283734f63f4cbc9c71. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ62474213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9585c643e622e4dfd241b07197e3d7c62ec0c4b433a81edc873066e20fed8d0b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFN2310479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8779e11c85caa81273fdd09a44158fc51b759fbffeffdb6c80cf707b7c112f17. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFL2369028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aa926558ccc225399a3c1494c04bc0301c854d4b35cd350565e3aabc37aae7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES92412806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f7886a2e5381d7a540d3fdf749085065340fdf33da39157e639dfc33693f93. 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/QZFYZ2433987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aeab71a2f098b6a46cde9aee62ff1f701d6d5fc5804ecba85eaf41476a4a4fa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA62407015.