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 0x2703b0da69052c4b4154f2bd3c41d0abd96ef0287d6c39b2a055991a86a3f26b. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b34f5642-d45e-4689-b6a5-e963b6c76044.json and https://artists.proofprofile.net/proofs/artist/b34f5642-d45e-4689-b6a5-e963b6c76044.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 0x84063353165930fd7509ce7e757edad2f6b8984812e0147e3215bf7cdf4853be. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ZABKR2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca79f42f2c1746b76dd58d3359a843bb978c03918b2af349dec3edacd7ed276. 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/ZABKR2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996931d156dfb98e538af783fb3ec9afe3d3a070634188b769b99dc75da460ac. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/ZAVW22200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5e2ebe31f7b56d28ec174da8ab5d6d9ec8af1797ec956dc0b76f0021736145. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ZAVW22200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fad2036da498eac6e3c998e2ea704e200156bb7163509fcd99efb297a777ed. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ZAVW22200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e07edb73dd10913c11ccc6be7f0cc6de3468b165ed949612df18b3c5281d42. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAVW22200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8271332178549cce1294d5114f4a3e3fddcfbecf339827ac60e48180e9f40495. 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/ZAVW22200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a651a33210bc0584a4073d44f3f64aa1d3bbb4945d85b59aae4ade00a3fd7ea. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ZAVW22200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa56da64ea6f6c48dcc53241a036ab479d4c8975fc3b1f37c552cf7dc90341b. 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/ZAVW22200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2400101baf7257273d39f12256556aa9a13b0ab46fa4923fecd780d6c9150c14. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAVW22200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f73cc82391623853c294419a0ccefafe8dd20b0602c56c62192a511e9fcf655. 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/ZAVW22200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f1d53163ea4e7e1699ca7f4dd48516a4b9068f71bda4c403f998e7997a8e85. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAVW22200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0308aee03decb4fa5de26b542ecb9c329f3cde370cc581ca6eb50072c03fd5ef. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ZAVW22200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8b9b5e179b2c1b4a06d358672b59a48cb9b463bbeb6f564724cfa78f3e407d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZES72247754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14b42e0721512af748644ce8d44cdb2afab6ad49873dfe9d7bbf632a03608aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDFP1826728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf418d8e6a28b3dee0893253d185db1d5ec5c90e653534c9bf39b4ac8943db9. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ZAVW22200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3567479ebd22d49b6cc64904b08f80cd17fa96103a2d1a7013c79d2d15b21802. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ZAVW22200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489c0761613768eb63075e61f37e5b669e64f0bce7788f6b12707c6c30b675d4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ZAVW22200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8ac007ac72a8b987eb358d6aba231bfb3e6afb87e9833bc4f57a64fbe0155a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZAVW22200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794660f4fe463c1063fa898cf4ba16291af700cde25d8d12f9708575018943ce. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZAVW22200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9efd04a7bad3f6bd119fef96ed6a9a8df55cd260324728a38b7358dea480f88. 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/ZAVW22200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8ba60eb70f236c025951b617a6a007d23cec367bc7c449615b740efa996f57. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ZAVW22200181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b3b31a9894ecdb0eb2fb233f9fbe54ab3e5f34436b604300c757750d0be368. 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/ZAVW22200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d610a732e46e5d98b73fb124ccee2af319c70c216f148007e54467c9a3145a1. 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/ZAVW22200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7145c92a1d158cfd15be227d2f3c308abf7f665f4eb04f89e5b5ffbb04beee. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZAVW22200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c34a7fbf3b1f9364f10c40e269378e5484c212454caea91d456a68a3eecaee. 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/ZAVW22200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5530402cb168f2af601c95be4b6960029e2749bce5356ed3b004ee071aacfca0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZAVW22200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcb493144fa6ed97a4a590d4bc3b26c49364f01169e3d3d3701232e099c1e18. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ZAVW22200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aadd810b9e0b34b186b38ca3a5b475eb19bd6191dafcd9cab322a3356fe7c2e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ZAVW22200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2893ce9e09ec863f7af18b2224ee9e903ee07cc0f63b020176b893bc9eee285. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZAVW22200190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b72143462175db845ae1591f86a6d8c49be0cfeb7a88b2b693d278983eaff7f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ZAVW22200179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dafa74f79ea4f39226a2ca0faeff5b49440bfb19921e2625b8ced6135d86809. 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/ZAVW22200177.