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 0x5c2c02cc656b6afbbffc5d67bf7806943926ff8eaea51067854711d560bf6958. 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/952ab096-dcf2-418e-8ba1-5bd51ef081d4.json and https://artists.proofprofile.net/proofs/artist/952ab096-dcf2-418e-8ba1-5bd51ef081d4.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 0x921055d5c26a2444087ff017f0df3209d264019defe2f4ecafe22e16a12e3ad7. 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/BRUSA0301175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037168e5684b1d75b08d0b4a7d73f5b8339225f41bc9905ad9daeab7a9a1a007. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRACT1606862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f47c3bb7d2593f1ff9a390019bac8a60f8886ee12c6738e1042d01d30063f8e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BRACT1606845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ae0ca8185c0250f31d3ff7e95b3a8ca95923f37eac3e3e212f4112a68af511. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/BRACT1606846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c96a0c778957c4e38553524ce1d0a28c3c9c4448b74789e7e98a533618d050. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BRACT1606847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf34d375118b8ee36f520f77b390c8c3877dc3fb5bc3f5d139a254814943505a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BRACT1606848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122fbfa1f9c7e8383dba527b2909374c39fed976913a5c0a353d90a9c1f7a670. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/BRACT1606849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc523f07bb2dee76cbb4eb74c983b627773ebcf0e0c91a42a4e636a507a2510. 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/BRACT1606852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5ca3875897c1046a7a40f468c8801d9ad1e65ca4dfef6bcdb46cbd02bc089e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BRACT1606855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e61482332240231fa5206655bb8aca23c000209d6eeccd78d60e88aa0a3074. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/BRACT1606857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207004050d0d1bdd4658f6aab633f83b98ec6b9eea5b64ca57812d56ea48d6ee. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BRACT1606685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99934e5d9c5fe52d068c4bbc4d6fc15ec6a14b7410cafb2db5b3206f89e40355. 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/BRTMV1600337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e33fa4a73ce845d36c56a08fa645fc1a789c07882884d5d800ea7f8cd2a0127. 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/BRACT1605531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b9fcb6747628f464400738181af83d32a2128419037f5623a2f58e655d4f91. 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/BRUSA0100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a2a64671819a96bcc2f3287e41730d83176e96ea93a1c290ed61341001b5ac. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRACT1606818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa303816e1e34aa398888f1a46017c5cef63147c881562db9ad228a61b1bac908. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BRACT1604207.
Festa da Uva 2010 - A Festa Que Encanta o País
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb214f838f78b2b296a530f09d6d618019fa309e06ea134c4c99bac4e59d53841. 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/BRACT0901089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828e32cd8fda228b6b253c8a098fc5e95c1787f4369592dd7e6bda295936c371. 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/BRACT0800378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd25c3a105f6d5bf0e80403b7a38d3ffd4203ed162b326af351a8e891050335. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRTMV1600319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ba1ca3364839bfbb1230ee0b0b20379ccfed6d165359301851921647b7af65. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRTMV1600322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079315d775f4c756f8497972663be2bbc8e938fde99b3894d43facc51d65dd26. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BRACT1606782.