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 0xfe856b11568bbb9d2913a9756348d617c3188ef8332a9b8992232c58739d88eb. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/490eb90a-baf0-4d3d-b069-9dd6fd89902c.json and https://artists.proofprofile.net/proofs/artist/490eb90a-baf0-4d3d-b069-9dd6fd89902c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Viva Frida Kahlo: Immersive Experience (Original Soundtrack)
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 0x59677c0b06d72646384b5b4cb98a0fb772d60d34267bb9cc9818934ae04e7ce6. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZNWX2141415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d86cbdf1974a0941deb89594928bac63ca52451230744dd4b0fb5ec45bd1147. 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/QZNWX2141416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acac65105dcea3fb4130d7aa8b821654fb97c2dbd3129a5bbeb63a94e3c03ee. 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/QZNWX2141417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65e8a5a46ecbb4770f703cf53a331c76b2ec8d5ed08bc9529c91d1cf698ad80. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZNWX2141418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303abecbeab80e6f62f1292d864c4cb0a36597138ad41124a1b07673761082c3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWX2141419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf2cc39c2a5104880d34cac8d8718c43d49b7e34260f6a7b81a75b94ca6e6f9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWX2141420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f41dd8871c24ff13b129d16972ab182284fb8412b1293bcd106a8c755335455. 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/QZNWX2141421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071a1ded6cd6a00eacae738406de8e5cc3c6c5c1caeabe5e457cd610fb6c1896. 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/QZNWX2141422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e57661d582709197c81ac4f352e606755e1d3c33330c6df74cbda4217a7b8f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZNWX2141423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ef2160bf5a019768f79813ae2ab62ebde13b6f18aacdece90e17816c018034. 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/QZNWX2141424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd414968e1bfa9d2a46dc45f83c673fd800a2db96da2f020e51d19e400c6d36b5. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZNWX2141425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876f8ab1d047bdc289c1674663448f52cac96570bd4688e385cbfa901d37d7cd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWX2141426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03e404ae33775b09eee0b1deff5c9ceac2ae1844ed1575f9159e0f46bf50a25. 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/QZNWX2141427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc287421781129b4513a319e6b9240c6ce93370b8f091df6a0eebd4c00e364d8. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZNWX2141428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c978de0be59214e2f4d86c44f6178bcf180360f5b51cb90d387111c616c638f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZNWX2141429.