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 0x40ec90e7372892015b53da7638fb3f2ee30039dc8fc8664353a9df69bd1873fb. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da16304e-6a32-49f8-95e8-a911ed2e61b3.json and https://artists.proofprofile.net/proofs/artist/da16304e-6a32-49f8-95e8-a911ed2e61b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Belgrano: Cantos de la Hinchada V1 2ª Edición
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 0xc8a81a31ec3ea84dfdbc4a920452dfeb44ee80d4be990b6009fd3c2226cb68c8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GBSMU2134248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9055f600d5675ba8a8e64d7d852260c6095b44d1ca56a1d5338b1dbec1cc1683. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBSMU2134249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718556a5390ee9c643c2fb4327b0c15b2cb27cc305d613fc56379d8745270b30. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBSMU2134250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246280ae19bd69146eabaaaca4202f35758a8bdb38bb8b5768f0f909396bf996. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBSMU2134251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07fc9ad3a777fe295c18deba0b4f26d4aa2e9a95115fe3be2f4e69c9736c29f. 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/GBSMU2134252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca676c592fd4b0775e9e135ee8b96ba3a607016d039f62c70203ce9d6f1aaa2. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBSMU2134339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c17712dca4a46fd6fbf9d6b7e43b57cc8618d1a9137c6e87ffb407ef8a1a254. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBSMU2134341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b0e12e27c07a389361fc776bc84dca216058c5ffa639bba0d051a42aedf5e9. 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/GBSMU2134368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe2f6cc4c7af056f6049ea87f93bc53a65fce6dd8dc7feeb97a988c75310a47. 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/GBSMU2134374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1010f12d9f1847f23c916cc440594429fef4a3588e35572619b9e7b74e894d0c. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/GBSMU2134376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c293a889c8e7539113b590d18d9bc98ceb1bb193646104fcc0eecae5b0b6b56. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBSMU2134385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6606fbfb74b15ed66fe9fd26ca8b2b83732ce9f378c721a2cdb399bf0aa0b9b2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBSMU2134388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa078252e9dac7ca5ade93b16272aca4218531b4c9631a00b60956b1d8b854f66. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBSMU2134394.