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 0x5cb8aa22523985749f8bcbd2ca7a90a027b0a6a2c27f98a67e611ec647a892d5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3471519a-b526-483a-b09b-47d0c9d20cd4.json and https://artists.proofprofile.net/proofs/artist/3471519a-b526-483a-b09b-47d0c9d20cd4.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 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 0x2d413f2fb9af32fbf9d9d232c6dd806b216c21a07b867412eeaf07a9e0a69c8d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/GX5MY2265676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c443ff5b676772c56e404aeb28663764cd21a838994b40de5813e96f582ec98. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX5MY2265677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae8378c0f655a580670887c3340e42cdda3876bcfc94bfc1a73d871b807261e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX5MY2265679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cd8e946547dc43d836236f30df59edb14c34e93cc3c57b60f410c7fc878ac5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GX89G2213662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feea7de52187554e7226f300af3b2dea24caba38dfde48877a807b5c4af34c2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GX89G2213670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44facbfc1a9b60ad9d11e368c1c3875145642d9d76d3678ef06ef4f9701aa49. 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/SE6TI2363263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b167a6b5d15f426e2f3e83e4fc8cebbe39fe16993fceec0801f57f29d616ec9. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SE6XW2349914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa67701391316ab5a593a5e4c5aa3aef51b1234d8aa889287efa3c89a95ec17. 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/SE6XX2304779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeb5054dc8e4b8e6c56da9fda919c3609f99534f06d42aa4c5005893aa5882d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM4TW2530051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d71c37ea059fdd0c0525ac5c6b0e4a1efb2f8362a4e80385b368fa6a408303. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM4TX2506981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e1bdedf7cc5dbed98243864c12df5c7b913464292d11bb6133b993d6958db2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6MZ2512260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc442107bf3af1f34e42ebbc2aa81398b3582362438a29a224e560866fd0c3cc2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QM6N22543315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47ccde12fd46a7504dd138c3ce1fdec210f19b0a8b9df0a8097c570e9c96e30. 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/QM6N22546123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb749f1b07fa4316fcf42b1414b5ec64891f2c9c3c916c45bac18b2f7b03a3e59. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QM6P42564102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce160196f855268a1db68e1a29a81c7385f20fc052312491eb66dd65cc45028a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6P42590536.