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 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
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 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.
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 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 957124 (2026-07-08T03:53:27Z), 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 0x8aa56da64ea6f6c48dcc53241a036ab479d4c8975fc3b1f37c552cf7dc90341b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 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 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 957145 (2026-07-08T08:56:20Z), 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 957124 (2026-07-08T03:53:27Z), 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 0xb14b42e0721512af748644ce8d44cdb2afab6ad49873dfe9d7bbf632a03608aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 0xa9efd04a7bad3f6bd119fef96ed6a9a8df55cd260324728a38b7358dea480f88. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 0x30b3b31a9894ecdb0eb2fb233f9fbe54ab3e5f34436b604300c757750d0be368. 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/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 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 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 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 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 0x6dafa74f79ea4f39226a2ca0faeff5b49440bfb19921e2625b8ced6135d86809. 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/ZAVW22200177.