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 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 0x48f1b2826475ef8fb72bb65222a1b8c705784aeb659fb6f4b0855c6a291bf42d. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa29dd50-d26e-4496-b748-12613bf28400.json and https://artists.proofprofile.net/proofs/artist/fa29dd50-d26e-4496-b748-12613bf28400.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bonito y Sabroso (Francisco Guayabal - Castellano)
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 0xa09604b76bac24282d132e438144f9ce00fc61b402a0debea73ee0cd7971985f. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ES64E2503125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ee32c85237ea696c8e756c1092a38f005419d32f065a86a8bacaf21086e922. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ES64E2503493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0f24cfd9431b7fba1d419f6f888c9c3366231f72a5b8af75a996f564ff79d8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ES64E2503812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf82191b0a3c8146868d47e9d194ec2bb952d396010537cb35aeeb04d6af804e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ES64E2506823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300641235b21477e17712c333a6767ff9a4500b522627a44ad5fb5608911ea82. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ES64E2508762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3ca3e0ab9a4481d5fbb34cee0062f2b83f466c21133afe7ef4155f72cb91e1. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/ES64E2509160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636d183e8a5a6a9be86836f497ac89e7c1f9ee42d08240ebbf582fc03c5b9110. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/ES64E2509349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7373e5d163178862a0b98b6f378dadc0e571cbe079a61fa544a73f359a594489. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES64E2510914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad4d23ade0b2878ba528981db812c99d0d8416a9b70afcdc95d5456266e89c2. 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/ES64E2512263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efec54c8ffffb6784e3c2755272fec1c1cf0bc4097344dd377a4ca41f0440a6. 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/ES64E2512549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134b49817a1d99f645565cd2739b8fd3ed2709373909ffabe9af5e91a72db688. 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/ES64E2512755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990f9f930a547bd16ac06f21c2b47e87e5c1c6c9439c2dbb28a9adf8c5665034. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES64E2513151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fac9b4396b46822494268b8ce702e4524d7ae5f0a18727a3c52bf25f5ce02a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/ES64E2514018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72323651f505acc36b669b3401b045d58c7e67128fa1699dfb45a1bc1462de6. 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/ES64E2514672.