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 0xb2a574eac911040dcaf93fb1d2cd253395d63c1d9a45d91496c77114cc660889. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4647875-e6b5-41ee-8b40-ba35bf2e0fce.json and https://artists.proofprofile.net/proofs/artist/f4647875-e6b5-41ee-8b40-ba35bf2e0fce.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 0x28772dd0c3c28dc1d29f68c8375a17e715adc5954d1a145c23986a66758d93ee. 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/QMDA71856638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5240143ca9fd621a876d0a62d8bb5198fc45c7d9ac6f2d1784685b73a7b6c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMDA62117546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0369be92f9148938d35d55c3d86a9a8702aa94e236a9d2b06d7fa208569049. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMDA62117554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed865e54504b4a60a04d63b85a31c85e2032adf52f667627b9115972de0b3507. 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/QMDA62117584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fee6a7a31c8fd781e0f27922d9c2636437496ff96e60b4a3a56cc9114b4549. 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/GX5MY2337164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1345bed5514deeaa17664d986010b202e4e5e7d5e1f981a3e7c90951cbb39fe6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM22478039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7056957775e2f9097104be3b22c424110de50ec517d1671ed6630fd2513e20f9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0P2467828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c6a780b38c697287ce5dc5c85c274fa24ad6e68c0d6c40333da4dc2669ba06. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0P2467830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4c7e70d7baf7a27665f4d26666be2e957a9667ef2d58efa4f065ae43ec62a3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0P2467832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aecec9f935c5c9223c3252798aca05427cfe2fa25d4e2cf5de321be653c826. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DGA0P2467829.
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 0xaf0bad203e4c2bce493ceca69d855eb023c03d5595f6243025fa8f9e0fb7337d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DGA0P2467831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6567f5fb99af74a763db494209e0f9aca3a10acbf63e7c758d093f7f2d87c7bc. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DGA0P2467833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14804a3216a133180e5e155009bd2698f4b75fb8a8b991648348816e04acfad2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX282324174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f835305a9c6180eac2b1f0be3d7c88dfbeeb686e7813c8524f7c63b3dd8af2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRX282324173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8551457a4f91b84a50dfb137582e6f6069af3ffa2168154e2161aec1d682a716. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR59R2320488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8403013f3e2719ebcce45c61253a8854bd199e244ee0a8d78dc2ac5e71e4d17b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRX282324175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba7ea673b87aa68f94a779de585d7ad65fea93249caa1032daf9611079d9609. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX282324178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe182d439bfb0cfa8ad0a2a649fe7bf0ccec1ef2d76597bc8730c0ea3071a2920. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA70K2000347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf559af68def663de107060bd0fa4a595454131aa953cebbf6692ea8e65805c07. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEOE81800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4db5fd7ff17d24ac81b7ae867d6fe49197dcf0f012c63cad7b481f1daffc658. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEOE81800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd23a4142f9cbade79cc41c59a39e48c1cbed6755c6c21ab04315774748cb16. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEOE81800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860ca2d3b8ef39aefde6cf06856118a057902612a227cedc5e3cfe508089f913. 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/SE5XG2326710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bed7c745830db425557e5a4490b9ce2d1075872c45991a74680899be5f0062. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2380472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106e97376ee8a3f85c61452ddd2f54a82efb7e94ff83a34aebde638e1ef2dae8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMHK2085852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f436d3c6bb11b83c22474f0dd7b80db75098ef97e4832f3e2ba1288b82b4611. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6SA2230436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2335bd7cbb145a0087a7564008b1b13dbb54001d08ac1860eccddc89f8055d6c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4Q2221092.