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 0x5fe28719a9f68bdf46ed1a6180271443f4eedb96d6b05f2010008de470d557f3. 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/aad80fef-7140-4bfe-a0c2-1e9f84cf1456.json and https://artists.proofprofile.net/proofs/artist/aad80fef-7140-4bfe-a0c2-1e9f84cf1456.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 0x6c19d14a23ca2b5c16b031ee290d34d984ccbfdcbad56cb2a6a4547ad2e7c7fb. 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/NLYK92300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb662cee1a41387ced396268e6970abdb927ef2744995c8f5ca68ab7ca7cc721f. 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/NLYK92100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190b3f978fb64c4192f11508b6e816348ae5d110b67d656c402a0a3141c0bf34. 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/NLYK92300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ef8358108db42084b514bb529cd3dd06f70a171d5ac3f32dccae457213dd3a. 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/NLYK92300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7934c9be5537d3ff06452249174e37b4b714af30e163a3c079bd2047895ec78. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLYK92300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd6052efbd6e811056341418ca6908233050e0c36f5b4a67930b2daf76b9b9b. 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/NLYK92400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfad5ba4919198e84dc1bf1c743eb40f7d3e331f6b4b015d48aaaee727fe1be. 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/NLYK92200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65d6d3ed9140e311c1dfd47e34e4011458c41fcce638a660cb211a27ee1950a. 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/NLYK92200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3e2d4c8bd5b6ff844c6630ee1009e3ed5ee60a7a4981ae7920d29edc20e425. 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/NLYK92100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ea41766867e4b40e12b53ea05553e04a67017e65656c417c3d1a0b96eefd2f. 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/NLYK92300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ad60df1b4389cdd4c79433bd3f6cfa9034f827400df018cd9d9e1ecddc15b1. 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/NLYK92300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5145e36469dad58e770ebb1d232b58f5b21fcabde10f8676da183f66d184d3df. 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/NLYK92200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4fba83684961ee45752fa810ff2f0dd5e30175d54648c39be762a4194c6fa7. 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/NLYK92400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efa1ffee6e71891a4c651fd0fcb4c4cf5057d5fa1341fc2963315d29f5829ea. 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/NLYK92300185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2b8d7040adc3928dcf21ab6130ea94e6cb688f4554e39d754928af89353694. 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/NLYK92300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e9ef3284f69f2c9fc2c7fccf5ff51facf346cdd1ce666e459b23948ef9823d. 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/NLYK92400335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e0269fb8a6db1a4f4944c0f13eacd273b0c9d512b798f293c6e64db4df131b. 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/NLYK92400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9877df59e66ad12b3572bab3bee99732f97c4558d1004ab1a71165b5858e856b. 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/NLYK92400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa504092a254ea17a9c33b0fbfa396f3c11cddb5ee90362243af79a3f26fbb04c. 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/NLYK92400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af9f5b6b2cbe09bf467a2bad0ee78692609256a959cdd2370d9c3425caad551. 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/NLYK92300201.