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 0x661c07c74fbcb3d7a561e8c328c23927008824c2a1af33797923148b8af4e569. 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/7642325b-744f-4354-be07-b43b7cf8b29c.json and https://artists.proofprofile.net/proofs/artist/7642325b-744f-4354-be07-b43b7cf8b29c.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 0xfb8ac8b48817d486afd7f0e857ac52c255920da0a4e726d715c666cd5e969119. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZMEV2182964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9939e49cb578d327442b8889aa630e26de906abddd60afd4fc3e480c58412df3. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZL382223012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366df9cd31817ef10fb770f5fdf734eeba4d10afc380ef6bc4c49d9ad8e0ae16. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZL382223016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc733968c5e00b2f02ae4e3e5751fc5ae6cd4b6671b9852a1395f8f24db823f55. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNMX2241893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cfc355d14dc4045255fd5511c78ea083ade535980518c1f63305bb0f68f6b4. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNMX2241892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b1aabc18dc02682fd483d8504a6c19c43f1593348bbaf8f954058c144152e7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZNMX2241891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64db91ff7f1233590f9b60ae156d88af7a0d19f18b23ae05d2e57f2067657fb1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNMX2241890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7001e23abd6a41061c2d6d8ac9eb1d17c61e16a72b36d588fd9351112e3f1be0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHNC2431971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb751a73f272f826b01f39fd545215cdeac41a2c40ee528f7686be1523a45515. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNWV2474009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb4af3967a460b6f74d7e4e443671ac04d714c225e8d804f8daf3984ffb7498. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFX2497441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d432b42e0f0bc3995c63dc3b8218c6845b94c0713633dd16eab458c5ed93df. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZES72534241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6264fb245ad1934cc124b930f65588330ae0b71403868f4995f901b500af26da. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZHN32528026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad8bc1b151f04146a25a08f1fa9f8b043efb89b3eabde17ef7039ec950ccfab. 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/QZHN32528027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb517483fb03622714acc53fe6a3b9f438c474d878b099d02f4411db745bdf451. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZHN32528029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcce74c7dba8278aeb11388ee83bed84d182144d775fff6f27193c99a212de8. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZHN32528031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e600298f32478dd846b1f668fd1489b84760f5afd9d015faf61e7dac7704ff. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QZHN32528032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef0eec16c52e88b0c1e40b954c8b68e004a89637c62e803147b165590699b30. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN32528033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8f0dd1025579dd8bc676a6f5772c3f8f3229efb9a0b57d3dfae7cae1959d93. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZK6K2562589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dab3ecbde2b96c5fabfef3a3f6cf4978c11a4421dadbb7137fcfbeb4cd8faec. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZPLR2552254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bad0e2e6ae907334f63608ef55b570d475eda7265e3ffda4e5ac49cf1adfaa2. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZPLR2552255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c16783f7b02758094f360966f1b158906710c033315e439bb6637eae16f0df0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAY2571900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87aadec5d8d00eea4209323f9d29a469af1c902cfd1dbfe7d2fb252824cdf6c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZTAY2571901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d20eafd2e5d61e1f54b6650b1d6d72929ad9674ef7b4c53dc31e88f6ad6ec8b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTAY2571902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04aa4b1db4088fa5c16c0a2adeb0d8013987ccb969f09f1ee23f2e784c8d620. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAY2571903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4682d02429c46f874b3e88c55254d11c0f0a459d38a084c2494e0d3809d610. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTAY2571904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edf25b4e7e78bd5a989e05906a30c22cabf082a05c54c4c1b3e42005711799b. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTAY2571905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87fb53e6448831deb1e6587549cdef54b3b658670b671b6f4a4a654c3d06861. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTAY2571906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b87ebcc12b657ae4b4fb6395626bb5187e66ffd6f35bf5b0225371aff493d3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAY2571910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e79947fedfbfeada734c5926fc9251b09a6be05894f0a3c22bd1175226e474. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZTAY2571911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee787070698e0d388201235b9e4e4b6a828dc537fa4dae5f2b408e130138370. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZTBC2549198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f2a19cde370f9fb532e6c7ea7a2e473e7d1d08657e6de4147a8b01d566dd97. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZTBC2549199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5698ed26351e2af1118b51dbf2c7a908ea03b71f6b919b969d1fc876b5ea89fb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTBC2549200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116e95be6932d610e26b939f8b4ea5aea477d89c9136b652d6a6e529fd0045f2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBC2549201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb42b3562c2a036b86244fd06df1acf3b70eaf7251bfacd02d01acde4dff5a67. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBC2549202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24ab5cdf46e4e47d82a441219ee0640f09359f28f9dc9ba413b9278d01636eb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTBC2549203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0efbeee118f2620ce681f3c665ca39cdc87169023b8bbe8751a715fae90bf0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTBC2549204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbcc54deb8e0375ab10c4e095095bcad40ac8f423e3f3be523562dcbd688f19. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTBC2549205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f53350e5c961e0cf95486412716885b1570cf442e573d61968be0bd3046575. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTBC2549206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77510cd872e3335eb57414e55c111951367a97cb07d46709f5267b35b0a212fc. 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/USLD91742723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77510cd872e3335eb57414e55c111951367a97cb07d46709f5267b35b0a212fc. 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/USLD91742723.