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 0x5bb1bbace85c8a1532d974b88dec2d9cce1d847d6f5e8e6cd7a685fd284c81b5. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f61bfffc-f3ae-4b50-9ef7-8f0c20e44516.json and https://artists.proofprofile.net/proofs/artist/f61bfffc-f3ae-4b50-9ef7-8f0c20e44516.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 0x82af6ba91e4943e20ee664e3b4fecb29dbe06eebed53d314ca71bb5c2ee75ef4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BRELD0400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c51c41fa355ce16c5bbe2ec866cbd4bc937ec9858b12144aff5650a2551778f. 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/BRELD0400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4980678ee2510db8d86619d2de3d80dbbe7097606a912eaaf2ad7ea53e849566. 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/BRELD0400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75fdbde6354c0ccc1620cddd5a3129170347152f77d9776a20a6e71f27c2c9d. 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/BRELD0400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320ee5872d9d74c2c5468a2e9b9738185d0a8154a1f4c8aa89d31f9f760bb46d. 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/BRELD0400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a7a8e9c5ff688f01702bdfcfb13f8d879531c24d8cdcdfcecef3defa73d4dd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRELD0400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d528c9181fff38e4d8074f383ccb8345c32e3b5180a25246a9fa568bf2adcef. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRELD0400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773948524b3ad15ade0e1b7088bd4f62d9c60e4adb79c743649a8e8a54595a23. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRELD0400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55532c0de6a8e53e0eacc3103544ed00d554906efd4f780e11fbf6596094b459. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRELD0400082.
Danilo Brito Homenageia Canhotinho 70 Anos de Carreira
Panorama do Choro Paulistano Contemporâneo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf300201bcb8bdea05f5e800594be26243ac9d44fa7a50d924f2d564059dd4b4c. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BRYVE1000002.
Encontro de Gerações na Música Instrumental Brasileira (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d74769b39d74333896dcf1df0e8a30017432a8b57478caba44344f7adfdb874. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BRXMI2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe84ac3c75b1aa7a20276dbf922b08143578d560b3ed7804be1615ef05f1e7e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BRXMI2000010.
Suíte Retratos: Mov. Chiquinha Gonzaga (Ao Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe652fcb52641d7a4428c79842848ea8dd37136ab51174fc8671407b4e361d735. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRXMI2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20232de47865bb22ee81597423f874f90c196c95b49a67a55feddbbd6364af96. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BRXMI2000019.