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 0xf916fea339125731e26277ef218b4cad2c265e4e00b7471a71d9b13a70676205. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a63ccf32-87d0-4934-b9be-15227a0e393a.json and https://artists.proofprofile.net/proofs/artist/a63ccf32-87d0-4934-b9be-15227a0e393a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Music of Armenia, Vol. 4: Kanon/Traditional Zither Music
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 0xe7b6bc0b9b3c4d138a30293687c65a1f426ee2d30c50a564145f49d0392de424. 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/DEA749610953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677df8767ee8bbf1e3e90baf065a176315f8899681cfbc1f28053fbcd939b315. 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/DEA749610954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9192d2a05f7918fea3453c4d9d92157a0ef59e13efd651d1732773893ff2dd. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/DEA749610957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863941c0bcac718c46529b00e1414d7e6058e70d5f01c7437c58e15d99b3a3f2. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEA749610958.
Trapizontsinerti par - Armenian dance from Trapizon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af9db75e2fda5212f9b25638c754fb34234458afe613d21a022d46aceaa35fe. 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/DEA749610959.
Unabi, Marali, Shushiki - Melody of dances
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fbc147805738d16fc347025e62af9dfc6f6903b34581e31abc4f1b022d8d3c. 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/DEA749610960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d7198f94724e588629257b30781b967e81c63dd69114a17aed8a8b2c931749. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEA749610961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b10cb0bbc61bc2c976057a2dc6d67f742ae2bcfd5e59bf1ef2195706130ab06. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEA749610962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0162472d6abed236dec3acd0cb66d4d022661c50a72740d786672abe56e59fe6. 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/DEA749610963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb485061e2df9548f1ab166cc2f7dc5d05e6a9f5effbc5476a2cdff6ace2b063f. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEA749610964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5613dd861fe38aa0de1aa335c1c83897757d48a99045b99265c4caa49336da9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEA749610967.
Sisters: Women's Music from Celestial Harmonies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57a3c65b290b3b6fde80cf72bad44267d2f9e1096b067e7199bb89809028997. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEA749510701.
Nu tuong xuat quan - Female Generals Dispatching Their Troops
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03cf86633cd418b3e4fd344cb49d7753a002f3b1ece06fc4f2047d854384e77. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/DEA749510613.
The Devil's Suggestion - O You Who Are Illumined, o tu illustrata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c1845e79942c11bd8f9a02feb8c6d1790949930a90d665e15a56d3a5fda032. 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/DEA749611055.