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 0x2005ca078e860c87ece29fa1b1e94e8dcf6fc5045b7698bbcf75b5c18a826e24. 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/fc2a4390-8bce-4587-89ae-6592dfd006dd.json and https://artists.proofprofile.net/proofs/artist/fc2a4390-8bce-4587-89ae-6592dfd006dd.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 0xfb38474d941e65123ae8c52a6358ded036f6bbeb4c804c84d9447f2b420ca7aa. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/RUA1D2157049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cd46b9b5c6b79cb69be2dfc46428e36647d6ddcdb78dfe533a143ff7bbf3ee. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SMRUS0071528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea80958f53a0bd0a926e9eb33781fbabcec9c18d62ba9201de54a49a235d033. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/SMRUS0071529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6790b65ea6a99d9f72b205aaee8718859b5ac84c793d48903077be38552a00e. 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/SMRUS0071531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d11957572be68b050cd7e59e649e0ff9b5947b3cba691ff13df1bbe4c16010f. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/RUA1D2262332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1b0c26a4e0327cac83e513a8401ab66373f9493a58c5dffabaa61798c0186c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/RUAGT2306881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1cd424dbb964066185d8d94e7a92dc4a657ecad531d50f53dec261ed918ab0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/RUAGT2355634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80f76ff9e8115e36861ebfac32b9ca3cc37a6aaa12b64c230413606b6b31c0f. 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/RUAGT2355636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497204535c28f095cf48f246ea0952db11db042fe0a60d80bcb99dad1245df3a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/RUAGT2355637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa747fc9f3629bc07c2d0d170d7ba4077642ce9c5c9048fe97b75fc19b83682ff. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/RUAGT2355639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ae3c25441c9c8a05411c7fff47b3f5cb2b008dbf5f2b657e3ddc1b840914cf. 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/RUAGT2355640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533783cbc0440414d7683f76baeb517f56a47cf17965f7b183a5f949b70f7a20. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/RUA1D2476665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb528c5b42840e12daefffc743b1af12cccc39b4a79d393dbbcfc1a4829802e59. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/RUAGT2418857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad31cbc1dc2a2e17e7d3b5a13a0a6d64dbe19daf7bc8a2b3376b42b047a84962. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUA1D2545994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bea436398ea37fc06b0b5dc4f770f5119ce3a9ddd6cb624e911c9e7e6453be2. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/RUA1D2585739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086727f433a2438d3d8f2680059c0ab2027fc13a2f88089a43faa51213960c25. 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/RUA1D2585740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873e9410a01bfe10d7dc11415b00e8deb2e22fb465416e07ed7b24156aba63d2. 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/RUA1D2585741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46561cbc2f5789d358bae5a07235c45668a535439062a290e38882909177dacd. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/RUAGT2539596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc52a353909ed66324295d179dd6dad390a4742be83b2551ea7b02120d52692. 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/SMRUS0074220.