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 0xc744663dc63a81367f3531ba2004c42e92e20fdb756dcc22d2c10865e1b5160c. 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/d3625c15-fddf-487b-af1f-1fd77daeb5af.json and https://artists.proofprofile.net/proofs/artist/d3625c15-fddf-487b-af1f-1fd77daeb5af.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 0x2858d4f8ef93596ee293f14984018ab3921263b20745a813ce7d6c5f3c523faf. 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/GBGLW2001051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e491217d51d09b01442a86aaaa030567ee2e3b43c540d9135ce9ca00789fb3d. 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/QZPEW2100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb3d50897d0aca806a2b7d45724a8138fc98126508bc5dde6e3353a0a747543. 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/QZPEW2100602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b972fe24e64d07d3c2e368c6a26458a173003488194b0f1a510872c96c85303. 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/QZPEW2100603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2b9d2faef7a32c1512aa2406552a930ae3f065b3d4487d69c1e05256215aa8. 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/QZPEW2100604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79be91936eabe020dc418c999e62592b78b0ff5a455aa45d79b3776f9e0bbf0. 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/QZPEW2100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732e358da668df324ff2d9216f1b08dac62ff903f8e75c457c1bbc73e0993eb2. 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/QZPEW2100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa851e0e93c6daee21c22a7fa969e5b36c7fa43657d3fc8769c026edafef986ac. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZPEW2110490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77007b148f3d1b249fe3f7faa05d67ede086f48218c8b7327f6e69a98a828dd. 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/QZPEW2255360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c45b25b26b5fed81ae0536e4d58ec4cf4f8307c8c1e62bf479573d2dc38b4d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZPEW2255361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4a1839f48e1c83499bbfc47ca4b7b537808a1ec1a1df836cc21f40391e0276. 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/QZPEW2255362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9361c6c4560e3911ef5b26616b3901981c9fa4d9c0203665ef6db23dc2967695. 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/QZPEW2255363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1ed30f14c6475bca3b11b24689f89d078b9b6176dca58cbdac6099f71e6fe2. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZPEW2255364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce7e2c4b41cd143c68efe46e093aedd5dad2f08b0eeb41e445e96f78709ba98. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/DGA082207122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc980c031da3ac0a703fc985e7b760f5dc1fc6e310a1474700b22f4030aaef67. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DGA082207123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1140fbe8fe77c268272061293469026e62e67fe12ee289a6c250610b02d463. 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/DGA082207125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092048054eb90e964d4c3f9a63891bf422712ccfa492bae4a4ec2e1f673698f4. 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/DGA082207130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4832e5d1e35988abee2092950fb33a1ff21d7032be38d587b3f8943df475cca7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZVEM2382030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aec191f00694bfcdec8221277c11abf7945512cb7d8a27d2cc3add1425200c. 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/QT2VB2497776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022b9f95fbb566c3d8efbfaa896b25e3818c67cc511ce1cfcdf04b0c0dcc649d. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QT2VB2497778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cf62d92bbe804f590b359cdee27f04a0af809a8a353ffd08799d860c34516a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QT2VB2497779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e67bc7cd8273ee055ad2ac22da23ab8aaae98deb1f9510512a1c860d883209. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT2VB2497780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d8f048b687458e8806378b31e5f017acbf921c9ccbe73c2d78cde36e13b575. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT2VB2497781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332424fee89a670d9b18471a6ec8c6719fa68a68dfcef7e3a3d7ec06745b3e33. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QT2VB2497787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d43910456c23ce655954dc22528c4f52750073d84f69ad94a12d2ff28b45065. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR10S2278236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742b4c81fea6ae03bb077c212107452727440fcd1fa50c223e4bb6346059fbba. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QZDA62359953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534cc49d24e9f03f33700ff08f79ab510656f722555381fa80693212520f01c5. 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/QZFZ22164205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e75df36f92ac304a2856e4b2fb379cf93f5e5f95da81d38359c46c6ad6311ca. 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/QZFZ22164208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864e992765c4acb9d0b776c45dd767d04c51c2ad000422b1a864e2bfed975319. 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/QZFZ22164209.