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 0xad719d75ded4168611a17e5a59dd25bbc6ee3d2b9385d65d6350be50b3085ca5. 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/74b14806-1d02-45d2-ab0d-ae150a802d9c.json and https://artists.proofprofile.net/proofs/artist/74b14806-1d02-45d2-ab0d-ae150a802d9c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Soukouss Ta: African Drums and Music - The African Tribal Experience
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 0xf4855f59b59132b0dcdd718b84288789fd651d8fd8faf6951b3fc6819b0b49c1. 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/TCAAS1001974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddab54608b6764f8fba49c581daf12afba46ba68f0381e21f500649f903f5d57. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAAS1001975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011ee8e9590390225ba281205975ad5c70b9850557b7651f4fc2a1338b4aadf4. 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/TCAAS1001976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8aaaeaaffabb835ab608d1cae7c940f47d9f7916ba5b69323a70a9f7f34ced. 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/TCAAS1001978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe710628d0fe3fbf617a2027e1243cbe9215012d326a64dcc68a0df5dd85abed6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAAS1001981.
Drums of Kenya - Music for Dance and Celebration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec974f12a0225669661d5732d7e87790de4eedf0ef50f22974016481a78e1d00. 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/TCAAS1001983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f725148da2fe66830e4c885e0d12885c619b7d90362def69c24a8e55df7f1a6. 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/TCAAS1001984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794d80f9a278ecc70fa8a6a98edf6b00368e9f22136b23f774f97ad6e58c7e21. 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/TCAAS1001985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccf4f1b6733cc999f7a45e245981c88dc9dcdc141029db28b891eb2b12eee2a. 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/TCAAS1001987.
African Thunder Drums - Drums of the Mountains
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4c7dcd378aae0987745d1113ecfdc220bfd8b36b4bb83ecdfb5f05e35220e3. 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/TCAAS1001990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c93b5e7694d50d8412d03d3ac1bb20bf687175b6e72b30b102097f1ed8f5cc. 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/TCAAS1003179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb249ea46348a018d858b7928558d30d104ad13001f36d264d0340889fc848ac. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:31Z), 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/TCAAS1003180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddb05339be120c162b878953f65d80d0652542e057ad6f9b1a4bf55a45c7cd4. 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/TCAAS1003196.