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 0xed33d82725df0d7dcbc002dae9c3aa6a04c71ab5372055d8ca302080cc9c8532. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43e757cf-7dbc-4074-8441-f080edd2cb65.json and https://artists.proofprofile.net/proofs/artist/43e757cf-7dbc-4074-8441-f080edd2cb65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pedro Estevan: Aroma Del Tiempo (El) (The Scent of Time)
Metamorphosis - Greek Musical Traditions Across the Centuries
Marche Ottomane (Manuscrit Cantemir 209)
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 0xdccc90d485a3a161fc6920d26f530411baa748ea724219b823fb27a59e22560c. 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/QMDA71379903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8576f88b252d046ba1dea6759fb71b022b470d43229e31c698332d20f3cfc84. 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/QMDA71379907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf764317796ab201b5f6a6690cda90d32f4696e60a809060d61426b459c13a1ae. 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/QMDA71379939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7076f8e9841e553660ba7350d683b7c5d5a8f53999a44907c844dd15369f5d2. 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/CH4210500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd149b5b2762c682fa26ec371246c422521bd5abd6e9fc4eb5178d1fb9802f804. 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/CH4210500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244c096a73097a088ae3acc348e9fd14c8587954a96f98cb1fc585766f3ebee9. 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/QMDA71379949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40046c53a0a840618e892fa6fb8d7b84c316d84750dd51b5d23817254d6bf495. 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/QMDA71379937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1620ecbf1e90c2cc1cdbe4c6b5ac190892e7858bd5c2d5281da789ab66d3a9a9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH4210500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc634bc87b0a416adf3929b6793476d66284dcfdc267744bd1a94a75c0115ad. 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/CH4210500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2f8ce68b8cfc996b1bd44864f84d610eccc25e8c7f3cbf994e5429601378fb. 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/CH4210500004.
Dök Zülfünü meyoana gel / Tanburi Mustafa Çavuş (Ottoman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102dee3a0652d435a168a9495843e18d8f396d9ac500a2a0b301cb0217c364f. 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/QMDA71379925.
Quatrième Livre de Pièces de Viole: Muzettes I-II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6c1937a8ac924eecf29784f0a9923c4b4128243a30b4a30c945579c1f30e23. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CH4210500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bfe6de4cde04b1f9c17728a70c6fd35232c906e721c5d0bdefcfd266b55428. 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/QMDA71379927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640aa8d3df3d12fd60fee74d1338e1cf39dae954a4291141fee8b67157be8eb0. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:47Z), 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/CH4210500012.
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 0x1d650ba553b06d97f2eb05f4c78edc00dcc8afcaacee369e64b18b16a331449f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMDA71379911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7d92789333fbeb7d25384694446fc45950efe592a3d259e255267593f31720. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/CH4210500005.
Cantiga De Amigo V: Quantas Sabedes Amare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3471e5cfeeafb3620f98697072d401b43f1cf87f9033820289d80b7794d575. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH4210500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7e62401d8dd7f06eb6b9e0b363270fa0c40d3c7d79114f5db1403251d1e660. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CH4210500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9700e6aa0250ddb54d7fb05fd42913899f4eea7977d785e2c8d9d1010c1029. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CH4210500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788428ed1184ee46cea11234e01a754ac815aba5e7c7cf231e545d89b5533f67. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/CH4210500017.