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 0x2ac952a537c706b051a65298a140813a97e47cac5899e3a129fdb4964cf8fe75. 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/b81c211d-6710-4548-a0b1-f8ba31af1cad.json and https://artists.proofprofile.net/proofs/artist/b81c211d-6710-4548-a0b1-f8ba31af1cad.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 0x1ef0f6e548ed0bdeff0173e209cc71cfac4cb3c793d8e38fe2b52168fb1720d7. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHN92151171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d81540b3b28aacc93e8f90d7bf9a84db15069adde1ba05604b6bec45ce7e76. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:00:00Z), 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/QZHN92151172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9263dc3cb3b1d66f325337b830f7ac3f06ab7bbf95ed1675e381fcd16ed9b0e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92151174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e8fef20bfca23b7966bcc772e4a4e5e56aedaf9fd32b7b7dee097e7155a48a. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZNWQ2067536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f362e4b1a2a1949b96e54c308408e560659d1236b6d48fcd308729fcd030a5. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZHN92151175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0711196c2c1b464539a8388a228787d33697c0f4b7429a1754ab7489ce843712. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZTAT2398569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a15c55c98f97afe043d7b6ba812b5122edd200af5769512f6f425fd559ac4c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:53:56Z), 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/QZNWT2485727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56634efbbabde393acbdfb4d7670d109e455e18ea051f7c8eed5ee694985a6ca. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZZ7W2472037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64f34db2ec1da809259ec493707932d1882511c9a7f07378c314dbb4b1bfd09. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7W2472038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8326db5e846845435202e8d1ac3e502dde3220e5e7cc940a16c6c371a6879b7a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7W2472039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d722604cf5dd37e21835e6f50c8e6df5b60a38d49206b67d5189c9da7189773. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:47Z), 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/QZZ7W2472040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e9f05d6fe29b4133ef35688a140bcab88d96ad98060cb5cc49b9871b2c8d2a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:40:03Z), 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/QZZ7W2472041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6dc67a44dc16617550a607eb63e16e10a806822c49606ad9af438bd5210a80. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:03:06Z), 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/QZZ7W2472043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf974875ac273d371944030ebdf523515f5ea2599e1f414334b87861f97ce86a6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:15Z), 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/QZZ7W2472045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5067e54b7a9669e3c61db78a7e3ad0a5e180d1b4ba917e51c8d365dcc62dff67. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZZ7W2472046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d567de97c205ec50f9ac3ad2859b6e98e0fc1a6daa5d3eb25c14dec5a33f3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:46Z), 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/QZZ7W2472047.