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 0x1c824319b04b69ad2e514e1adb95ee1b4ece45b74a47783059d88e1c17e02c7f. 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/a9901e48-db90-4908-80a2-cf95050e5073.json and https://artists.proofprofile.net/proofs/artist/a9901e48-db90-4908-80a2-cf95050e5073.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 0x06a2ae1dd6d1a14b3d2c0f227062e8bfc6f52aa0b2c7731c8628a3b457b6f63e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ES35F2401097.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3922c09c93d5cb04d272dac7fad0d79114feb289ee8cb6ebf349d6b520617bec. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES35F2401101.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118ccb7a5b342abaf66b8acb90aa60ae3ba093abdc06047807bd1a12d0c99df3. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:57Z), 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/ESA112448158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a78a590c6e71e8d44b7f218a38281412d688219cec7d0df1c188b3b88741635. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ESA112448159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5412142c1b9daa640ec4f49ba22cab58ecfea5cf180bb61cd9dff0a7260da86. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ESA112456656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a06dabe44b986d595426a640b299d064afee39fa7c74947223a97d2980d420. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:32:43Z), 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/ESA112559431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631b2197b12722470ec1b3dd23c5e668111b99618bedab56f1405340c460420b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ESA112559433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0569cd03dc18ebbb3e3a22821d7b565cf928bd90dad1ce825ce504cea37c9615. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ESA112559434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc4e4513095966598a0b5d27adf1ffa650a40cfc0b582f426d1dfa31f1a1100. 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/QZTPX2561077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec23537fcc11ba4606bb9329709e6fee20919312c4a901a0a576d7caea29ba2f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTPX2561078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ad895f7362a79c5fe398ea845a02da057e7d941de47d225333085a146109bf. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTPX2561079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200a2ef0fbc4dfa1ebe350418c6f308f61c4447b8b6bfec7cbf3bc36460747b7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTPX2561080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d41bffed38f7dbb779bfa5803d1afdea0a52d406c2772ccec94b5f3da42ba97. 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/QZTPX2561081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1c79f629fd9ff3ceef50b766785715ba7820abceb6e058352d9fc871f088de. 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/QZTPX2561082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ad895f7362a79c5fe398ea845a02da057e7d941de47d225333085a146109bf. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTPX2561079.