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 0xad62358c070037deb738f8f0662e302009a25cc13c32e5a134846c7cb7c92c60. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8ccafe7-45d2-4370-a5fd-4c3edc1f277a.json and https://artists.proofprofile.net/proofs/artist/c8ccafe7-45d2-4370-a5fd-4c3edc1f277a.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 0x6c8659ef031d3d559ef5b9c63aa122392c3d7896aac8846fb472d142aaaabec3. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:34:56Z), 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/ES71G1710896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42370ce165d2697a5eb06a10984b19f24bee2103cceff85095b8d0a6edcdd1c5. 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/ES71G1710897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb092ea0af8c31961226c2013e5aa81b01d2e1f6a57bce502ebd1f32a9c3f38f9. 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/ES71G1710898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48922f94a1b6415540c8c801ec2d3fa77725d364cbe8c4f351ee425aedeb0c0c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G1710899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c462467a63387f8ff3abd9a2c6871e337fd30c14666b7e8a35738ff99a3e97. 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/ES71G1710900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfa99433b52e5793a10e259c25b74c6e18fd833f9ab44794297b7483f8aa578. 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/ES71G1710901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1303dc73a9d05610d0ac7a2668724f7fccb4722eff902b832ca227f6426c369. 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/ES71G1710902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9412f6b24e93290efa3f10cb193c499207c67b695ca447fa8ede782a6788c12e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES71G1710905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce2f4ee83237827a5e43da995085238154c6eec0fe51f31d45755cb1965ee75. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G1710906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76741a5cc0976473462f41cb8908e95f9b567b11cf3569b5667f33c53cdc163d. 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/ES71G1710907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c892af6d1c0ab12774d1ae2955397864c16d3ab50dcd16f463cddfb4f7a638. 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/ES71G1710908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf233208a9d73dd5a5f1527581d83cb23eb189af22597c23a6172c875723d87ca. 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/ES71G1710910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2b2f1f4059273bd8faf448a4dbc378c16782ad6c9aa70d656e800600f7c7cc. 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/QZ5AB2174210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b932cb8e13a6c69cd2d7eea63cd5f946de8b38b32429895f07b25897d5f6dc. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZ5AB2174211.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d4c1269ba56387828a740b7679203ab3c618cc1ba5a310778fc537629c6398. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZ5AB2174214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e6cdb26db3d205b6e877ac6bedfb277fae399d398e68aa2d29394ece2a0b0c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZ5AB2174216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeced8ee4459566a8516a8855f2f3931b7f6a67a644b4bddabfdc4ea2789e44c. 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/QZHZ32154699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a0e03279cceb402b9b9684af1e4e172d73651c38a1cc9752524182a1899e56. 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/QZW9M2282366.
Relativo & Absoluto - Autobiografía de un Mc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2170d2afaadb4b616a44f11b12d7a61015d2097468e98cafe2d83bb768b524. 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/TCABU1434960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b077e6f28dc29f973172faa6301683c36287f1e4681cbb7706e7e4fb6c33828. 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/TCABU1446900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999069f31bd97697648357ad2cb5a7ff40487823234ff0d07b351ed966d65c16. 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/TCABU1446907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1dc2878398d3d246c940b2cc84b176d8855a7a7bd97988b8828545a8a95d5c. 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/TCACF1598638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb309223132ef53bf8d063e79f6d9b1629dd4073230505296fba96bccebb6ff9. 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/TCACF1598641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6938dcf25496e4abf28e484ac19f59a2961691ee833165d2427c494fd1577a0. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCACF1598642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe837df5f41c510ab6fc2a1267a9732f85726fc615d820f37cabfd1a021ad1726. 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/TCACF1598647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32273fba88d7d5a680c29bf00a6a8202dafe26f5fb79c7727b8233b1388b2239. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TCACF1598651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581bfdfb0f795d9996b2b3dd56227b5ae194a091f2e33e7e98b067f784c81d35. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCACF1598654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c15a726efa89022d438ba6fe11b1389172091bbfdd965ce6a5594dfeb20d62. 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/QZW9K2290122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06eb2d3d393b79c1b3b6fd787f23a4a2b9c9b01808361e2412c12000e642e24. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZW9K2290131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074293c455c142dd9ed0cfa0c50860fa106be1ee018c63f1192cdcadd3335de0. 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/QZNJW2102702.