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 0xc5a5fb5968fd84dbd1e07620c896388614b34ad4cec72eff48858bbcc8c56d07. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9493fa61-9033-4b44-b294-441135c0e706.json and https://artists.proofprofile.net/proofs/artist/9493fa61-9033-4b44-b294-441135c0e706.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ハルシネイション・シザーハンズ
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 0xe35a57605f8476f36f5ebaddc15a70e489289f7c05fe0dfe8695f1922e836caf. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JP92Q2301641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b388864faf4a7cc264b9086e488d582e4ae9094c3fb51678d68833f1b0fb32f. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/JP92Q2400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc04f27f99724ec83cd04f7cf19649a57408ba6497cd89a11a266dec78f19aaf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPB2487957.
The Way of Holding an Umbrella That I Can't Stand (feat. KASANE TETO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a73c856e36f54e30e2a56887b2891cbe935558c10a3b0b5b4782aff4bf1e67. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JP92Q2501975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26379544141dc558325b525be3c594a44bba1944e6166f230f2560e2ac1dd43. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JP92Q2501978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad99b87433f8ed5f87ea37558e369e1052f3f2904779ba06d4e0353274c21dc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JP92Q2501950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec021ebf18c81dac03b0ec5dfd39e49d44eb9c5b1b10ff6083ca4341f492104b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/JP92Q2301627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5c2f42d6611fc8e0ce594a5e889a21dfde92ad1a9cf137d70c79bfe9f7f668. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JP92Q2502251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a82b431f6eda9adaf4392adf959c6dad0664ca57984971d0a6def76a39fccd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JP92Q2502252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53df833ee354fce7c22c8d19d7ef197ee2b2c7f58a218c3d7cb96aaa04a367d5. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JP92Q2400297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35a57605f8476f36f5ebaddc15a70e489289f7c05fe0dfe8695f1922e836caf. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/JP92Q2301641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904fcab014244c5828241f05d4fe0a141d66650971a6b408bd4867ee8ed67d0. 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/JP92Q2502255.