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 0x5d46f6fcd4a54d9c1481f3727c8fd08e3cd2174412d5391ec9027bbf03235e44. 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/2638d82b-f734-45d2-84a1-3ae9f48a515c.json and https://artists.proofprofile.net/proofs/artist/2638d82b-f734-45d2-84a1-3ae9f48a515c.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 0x1c612ec3fe32c484fc4998d231065d9b2881da09e7343ac0fd3a49ed080aee68. 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/QZFZ21923482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934e1e5beaab922754c37992a8975ed1be76e806a3b7615fbff64aab9ecd2410. 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/NLRD52017987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3a079381bf80bf127eb22ba7766876827a444ed404d18ab47365c6e15efc2a. 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/NLRD52017016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aae0c7d2fdfeb0e9e9ae690039dc5ecd9d94560adf3b002a1585ac8d5673783. 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/NLRD52010191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e6b89d140c04b03f3f167c304dbeaefd8337b9199ecf53db4d2a62c545c250. 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/NLRD52010192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59338fb447b587b32f6fff8dea86447c5b4311898e45e284ea376215c1f2e4ab. 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/NLRD52010193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9786d0097641aaf168393f30e9f81c3a9ead40a947eddf1cac111a137bdd2f86. 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/NLRD52010194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622d25f80d782167169a9985869f29587ed266fac8072997e44fe6700fe6a356. 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/NLRD52010195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c07a41cd5b2bc6e7fbe874792b803745a528baa213bfd028eb03d97e1ddf199. 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/NLRD52010196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429c4202fe24a5b4b53a5997bd31e8d41715d20216701d2248e402bc46c8eb2b. 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/NLRD52010197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1748b147af9a8351179272cbec560ffa3709f97d5888f2ab4e46521d961e6f60. 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/NLRD52010198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa8e708f1a83ef4cd204a5914b8c11c27189f2a91e3bb150d470f130739fcfc. 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/NLRD52010199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62f1f4573f1457530b39080c0222d9f9da2f22ee92c603722db638ebe72305e. 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/NLRD52017014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1bd57a9838b6836c6230d8414d02a2b2dc120b6fcc5e347700314e7b1d5628. 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/NLRD52017015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454a2ea65ae0e121f7fb2f402511a4fead61e57efc70ec87f7115e94d67b7cdf. 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/QZHNA1946463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08731ed9ce0be1c0469df56b2530c8fa49d3efebebba8234c8ab3e91ec8c23bd. 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/IT2J82100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2fb9cd2955a950578ff8f4c15a18e280d7b10a4c1d029435ceaa870dc8e515. 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/IT2J82100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188ef29e75bc4b00b75e5401b6a7207f9f4f1dd7a7ab4c6a20113af93e50fa71. 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/IT2J82100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241a056685e22d608a8a96984766f74fb25198249eda2d1725a7f8bcf9232331. 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/IT2J82100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bce0198fe227b6adc65e0293e9bcf98a48c5e9a3ab7616c1674dc9ec691da1b. 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/IT2J82100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeedd487d0cf03ad36fd3c2eed3eaa4d317e84154d3e1fcb5445a9340296b83b. 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/IT2J82100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e5607baefcc38379cd4a0dad5482925f29504d573b292141999ab290cd821. 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/IT2J82100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d687bef4b7f4ad5c6859d245ca8124f97305f36c1ed1f6e8a5c134f69dfc62. 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/IT2J82100031.