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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221c61ff1f17fb9d91fad91e3f97adb85933d00e52736efb22fc0664e268d505. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7eefed0-9782-4384-9b35-c7d56860675b.json and https://artists.proofprofile.net/proofs/artist/a7eefed0-9782-4384-9b35-c7d56860675b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eadcf0fdfb0b67a622ad5b76998cf47e015143d7167faece0958b8dd2864bc1. 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/PT8EC2203001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75112c8b19769eb3737b742fe0fafb5ae8afd80049e74ae06ac828d8aac4a6eb. 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/PT8EC2203002.
Grupo Folclórico Tradições do Baixo Douro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd75801f01cf94d230c110b5d49a7657b7dd9ec5f0ed8d1a791fed66daf0d67. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PT8EC2203003.
Rancho Folclórico Stª Eufémia de Pé de Moura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b1697758b3f9b980117d297b54ef227e78ee9e635c3288a5748c67ce6eba88. 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/PT8EC2203004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0645c220e1ce694e817747ff81e63864d288852ac8b9ad1dbe15457ad3c1e351. 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/PT8EC2203005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c7925d20aaa764ba1bf50e8b4333a628a07686adaade364bed1c9ef9b3db04. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PT8EC2203006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a4406441867c1c6cdf83d87848e3570296fa0a9212d16c0b8af28b067fe8c2. 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/PT8EC2203007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214d29b9fa4b4fb158c14ff2609904c1cb927a694da17891a8f53f3e4e416eab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/PT8EC2201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd903e497fa32f0e5df48a3d5ea64798662e8ee5292a136c39f7145302c91c0ec. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PT8EC2203009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80888a8f4229f9eb531f9d90a765fddbd308e1e10847d68792421092126c189. 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/PT8EC2203010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb86ba35c082dae1d82c7dd799c78ad0ca864ed45bd7a99dd2a801a7fcd8a085. 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/PT8EC1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b4d06dbd3f046d18d85db9b78dee0975564397ceb4b90f1293a9eb04687e2a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PT8EC1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010efe55427d5d70e2b14abab724f90313f4adf02baee58089d4e4dba984a951. 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/PT8EC1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7373c0b39759fc4933b1831954b70dba753cfd04e364e399fc452ed3c896342. 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/PT8EC1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1174bfaa301aeaaf9955cfd2666b82d0df36af4600451629dbc8e438c2b929. 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/PT8EC1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d01ec352b07134c3cbd4b60bda536063d13935e7886f8fba2b77b2e8260fb1. 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/PT8EC2401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd903e497fa32f0e5df48a3d5ea64798662e8ee5292a136c39f7145302c91c0ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PT8EC2203009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0645c220e1ce694e817747ff81e63864d288852ac8b9ad1dbe15457ad3c1e351. 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/PT8EC2203005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eadcf0fdfb0b67a622ad5b76998cf47e015143d7167faece0958b8dd2864bc1. 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/PT8EC2203001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214d29b9fa4b4fb158c14ff2609904c1cb927a694da17891a8f53f3e4e416eab. 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/PT8EC2201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd4719aa080fd3fb9a8f937970818dc2067c2e0d1d4c7f599ab7d60a55b491d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PT8EC2101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ee8e7cbebbc2e26faa94593cc871765bfdaf207b5a782613aca0fe2ef04eae. 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/PT8EC2202002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfcb272f6a7d7d4cbd2fe06713949286441f87f51ba91840baa795677364e03. 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/PT2HQ2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806548f201137349b1ea119997eb7fb2ca18fd3cafd0557ee60f8303c0762523. 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/PT2HQ2400053.