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 0x6554f71dd0f00e39d120a2cb39d7880cc104de2ce3b185bf85da8af6d567102a. 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/587ba532-2085-47e5-a287-df62e5c9d5bd.json and https://artists.proofprofile.net/proofs/artist/587ba532-2085-47e5-a287-df62e5c9d5bd.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 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 0x48d586b484d4bdd126dff6a8979af0f8492fccd781f5e97d6a994025426949b1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ES71G2009892.
Homenaje a Joni Mitchell (En Directo En El IX Ondas De Jazz En La Ciudad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095c0de437a636ac27347063448bfa025ede5140a1b928dd5e6ec245c93a1e8e. 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/ES71G2108488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a0ed05308abe6b008b4ba72d741ef0ff065e5e605e20c0d205328f1d34679e. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/ES71G2041817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa32bf57b96f3642e9e170f65548c04dda00f77e8aba67f67244e85ff233058. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ES71G2221719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf100486fd3e88d892f94900cfc66ed11008134ee46fbe4cfab7f479ec3abf3. 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/ES71G2306884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c292f74b0219d2f52b4b8568a8da4ae2258b7e3f8caab35a31c5db06679987b. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/ES71G2405677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c948e243eb3c6c7d9ddcb84fd585a0c712c82bd380edfc0582f846ac05025e3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G2428768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41003c320b13c11a4fbdbf6a1406e96f0d75865171838fb348c2b57504a8c2ec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES71G2503968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9c189362e18f90bf2c9a6d32488e6f4f7e668ae1c24f0d360674e064abf855. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/ES71G2509321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f70206fe621baa257254def1cc4f0b7b460f758e185d5a8be011a4d1e919b95. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ES71G2421693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47da84e77939ad21e6c7c2e02a28963611c73f058c1af28a458b8546e012e793. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/ES71G2509323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41003c320b13c11a4fbdbf6a1406e96f0d75865171838fb348c2b57504a8c2ec. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G2503968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6216582a08001baf341e3593156dc28df84430223e163e287fc7bbb2b989d82e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ES71G2433547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46de5dced2866f95a07a8dad6585b4a39914a1276ee708644658d4e007c40b1d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES71G2509327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bf7dabdfb6f4ad537c7bab2bb2a9afe575e6da56a686178191011a0690ed40. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZMZ92017144.