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 0x498f33465def6c04ee7dc35fc1a1ae15d8bd7c8d547960d7d0b970dff0c21b09. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/900aeca0-133b-4f95-9631-0492a02ab9c8.json and https://artists.proofprofile.net/proofs/artist/900aeca0-133b-4f95-9631-0492a02ab9c8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Skyline (Hook N Sling Remix) [feat. Tigerlily]
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 0xd257fb57fd143f6b6c9c85647dd4c0eaed0d12eb9af576e1e2755d0084f04e1d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:28:05Z), 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/NLF711700694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8f225a729bbeab96845a7aa9d3126bcfc7d862eb991ac2b8369a3c00de5a33. 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/NLF711708865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6815934558c5fafce3990fae9f59e9417303ca3405bff2244945b66682f3f88. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEN061800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d896c0f5539e26c18e85f1f8863cc151014fdd321e617793b72766b57c9d2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEN061800936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0970a7c11e4fd226709a5d17dc5e1eb335bbdc09399a5bd842cf92f07e943a3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEA812000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b8911415bf581101c438586fb542862af996380d17323041a549292f2a7b14. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NLZ542001923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010320c152dd4a2f475e0f6784a67b46d64706d3722e16ed6796cf86cbede5fa. 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/DEA621900870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035203b12b02448cfa1131b8b99487a33acc96c5b02479554b1a6fafae9c4079. 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/DK4YA2076003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f71838e1e19c2e8382b455eb097e7f5e223af2cdcb2fd626b8603aa261758e2. 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/DEA812000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510dcd2962fe587bd137e41ca4c5e4ac1b48265943d6705ce53a2897c5ebce8c. 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/DEA621900871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a7edfdaefcf6ed63566c1e4b0334c884dd7ca542ee30cb4548776301e67dd3. 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/DEE861806868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec99a4a9fe1cea2c679e03a35afdf72110b500e80b9d0df156f08e4acf0ba38. 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/USEK71113102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8f225a729bbeab96845a7aa9d3126bcfc7d862eb991ac2b8369a3c00de5a33. 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/NLF711708865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b73fb46fa74768f1f967b0ddaf7a31ae28009840cb37da0098818a53502b3c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLF711706224.
Kontor Mix Session #02 - powered by TOP OF THE CLUBS
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37723c822065a1f784358d5ec7f5251bf385654c106ebfc68dbdfafd73c26033. 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/DEN061800316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4194bb49be8eb02060d891dd8f1057631bcb8d148f82634401532b06d10cef1. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEN061900003.
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