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 0x93a8abd305135eaf78d802c3fd231b8116d721c7c7dfc08d87b8b8e762b9653a. 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/a85d48ec-e927-45a0-83b3-50d29492e11a.json and https://artists.proofprofile.net/proofs/artist/a85d48ec-e927-45a0-83b3-50d29492e11a.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 0x5966d1df7fb541353df95bd6b3dfa0fdd97dbdf52797e76d3cd7b53cc396b6ce. 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/GBKPL2084206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797b98d5766c12ef6a18832afdcf10a45b8efffe4a5b7742fd8c5d7d00d2c06d. 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/UKSVW2000218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5966d1df7fb541353df95bd6b3dfa0fdd97dbdf52797e76d3cd7b53cc396b6ce. 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/GBKPL2084206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb7b3df040cd2483d0a9750bc75392eefb90098b67fc97174f14697584208a1. 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/FRX872365282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ce2a21682fc71c82d08b2f09faf2b7f749f3694511c5bff87e7a9fad22a189. 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/BEFM12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ce2a21682fc71c82d08b2f09faf2b7f749f3694511c5bff87e7a9fad22a189. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BEFM12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48662c058967c4558449a40d0423615550faa99fff4054ab32fa15f86a1e924. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BEFM12410002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cf4109942edf2d46556a1758e7e66a5de0e4cbd273b2776cf8a7b469e58af6. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR59R2136659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c2f7cc587000c4a07c5a14f2fbd1a0cc2f080d7010f8cd30e68bd0717159a5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S1901500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451dbd984a436bf8ac13365c0b9feed96c48a057f83877e8e387794043854808. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBPWR1600583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451dbd984a436bf8ac13365c0b9feed96c48a057f83877e8e387794043854808. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GBPWR1600583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8282c96b20983c0ce891b27276108434ddf7d2604247e6739c4c68897ba8e47d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBPWR2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360cfd598dbdc150a233a304a17f2fd2ab3362fea7aaae948f174eb20e1fe719. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB6ZW1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591481e400c7ae99a1f1c06f8ddfd66ecf5ef351fc4b2e1f870072e8c0697a47. 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/USZXT2453931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a212db9872dcceb14cc2ba95ecda62ffc96b9ad1a0d4d3d9542557e9533d016. 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/USZXT2352286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a212db9872dcceb14cc2ba95ecda62ffc96b9ad1a0d4d3d9542557e9533d016. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USZXT2352286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75f68d4a34d117ab996a8cc14af2812ec12b6592da79094a57d16b091413a04. 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/GBPWR2300090.