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 0xae2275db76ac6862b5e480fd30ac15415dbeedcbfd0025e4516f3ba1a022e064. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fde3cd4a-f897-45c0-b839-a2a330eee34d.json and https://artists.proofprofile.net/proofs/artist/fde3cd4a-f897-45c0-b839-a2a330eee34d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xd97fcf8802c9c1712cadbf6b8e476354bfe88bac94331591ca0687a3ff2d6657. 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/SE5IB2305024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a5bcd441daae23bc1ffe9b1367430e1ea9af5c1e66c67f63ba8f1bdeb5ae72. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5IB2305459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327ba6aa03c2a5718c0e7390e2804a984022a33fc21d58d7a746cef973fda2c3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5IB2304955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cf407e70412552a777e6bd14fc5e7f9c0689c63e491efb342b322c1523299e. 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/SE5IB2304982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a244112dfb2c45fdbec9b4ee0c5dd3e371660330e94b540091d50e33c698875. 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/SE5IB2305468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1cacc436af8270af641b656d9ba445a8988e524486a2b0afc2e566125a5d4f. 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/SE5IB2305498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e923f87459558a86f5ea83e3f07cf6ea90e59faddab1ee4a8c07ad79920233. 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/SE5IB2304907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebbd4ff2cc7856505c1983e41045948a495b1e993f8169e49fc4ce522a3aa35. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5IB2304934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09c1fd8bd2d5492d7258197f556e8d015a60527e6155a0e2c07bbd774f6fbb7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE5IB2304940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4624552e1c7dcf138b14a54a3703d085bf850beba12d33581248d288b3f89d6c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5IB2304979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdccff608b7c990084b2bf12703176da687382f446dcafbbf6c6236dd7ada27a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5IB2305066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7836e0c5935f737ec14e29f4839fbae127616c19e9ce9a4eec12ca8f551e420. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5IB2305087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1361850acaa53be25557dc41f31a0c72d7516c1fa2081a9fb85538112c35e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5IB2305111.
Wachet auf, ruft uns die Stimme, BWV 645
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea376d154b1423b37c0bcf289d45790c1c7151afa2f1d8b3039961348e91d97. 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/SE5IB2002091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7efb40a68084bae37f29fdd23bdde69fc125764c3957bd045166feae99b230b. 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/SE5IB1800283.