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 0x4d0945afe84381b50c700fcd960307cb673ddac9c3ae940d1a28cdcff474e77b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfcc8b15-0ed2-4f7b-af12-bcab8b033a3c.json and https://artists.proofprofile.net/proofs/artist/bfcc8b15-0ed2-4f7b-af12-bcab8b033a3c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x1349f6c115b932725fbb6aa88842e8d119e4c9b62403d0c4101713a8f9684759. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMQRB2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac55e2b058e4eb127f0539db1d9dd976ad49d4f0cce5b8f52ac97761caf6168. 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/QMQRB2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b98220de8e186a022b5d634df1ade7505effc4e88c08b282e57767427a02124. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:42:00Z), 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/QMQRB2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6754179fff8283fa1ece03da39ff70b6289223b634ed22afd1821d7ace40eb79. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:10:23Z), 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/QMQRB2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8294e6998ff4f400e6282c0809d14c5ac875c416b5b7502acacf6a508974e5c0. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T00:59:25Z), 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/QMQRB2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf0ca83c2a91879b33c047f0a219989fb212321305ece3f0213412a4c377301. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMQRB2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb018f757207e30bda659d1473a898064e3333ee22e05b8e6a04c02a1282c91f0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:24Z), 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/QMQRB2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d72463a78e3c7e8e0091480d7920ed6b931ef00de1e0c162994834fc559c4a. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:26:40Z), 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/QMQRB2000021.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea5a0d4a7ebe56c56162dd092d0c96ad9eb9228af4cf9a1e094714eed635584. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMQRB2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d42d0ae9b3b71acad8912970afb53f9d49d19d6cbb9ade64d750280df0f00f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMQRB2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538ef633f432d90f0a2254b437e1526cbecde940b03bad14b81e6b311e592c8b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:43:46Z), 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/QMQRB2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6845e7f1ce439bf99ba4228efb4bedd5547cb70d9d46ba1e76a63208eace2717. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:09:47Z), 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/QMQRB2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7ef7073602ab67c8001e1f8ac804e159d2f2a8f7cd924b2d4487fda43b28b4. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:24:17Z), 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/QMQRB2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3cfa99c8cf465e00830bf27428e19b306a8c36626b87a1ee88bbc2f94107ad. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QMQRB2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e21058a3578d23dba69aa316ed27ee34c8d2a8c4beca8146fcff930197aa08. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:37Z), 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/QMQRB2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bc5b58b923e225fb83b8a63b5d943770f21add4800dfce99456ad12b71927c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:02Z), 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/QMQRB2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb91703ccd0bb99790b77dd3bdda4ac4272c32fd6c49efbd8b31ba25f1393b7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QMQRB2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d8e7808070923a2141f8529828bc787ffa2f5a984f0719716ddec09a56c892. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZDA62476718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14f979df442f4d1d07759066f1b154ef8cccd62d741414428ad56bb97388219. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZDA62476719.