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 0x883552d24c7a39b3acbe4ba2e5f342be6419f7d9e4d83581921a7fb428dc414b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17c1c2d1-47a5-46cc-898a-453529b0f3a2.json and https://artists.proofprofile.net/proofs/artist/17c1c2d1-47a5-46cc-898a-453529b0f3a2.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 0x35922e75a0f39dc3285e2d8e16158235d3b5c3d04189b021bbef1bc9140af38b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAIR2470302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983d6103e831710e12e9205d4d10db47eacb77d78b9d46e20d6b4d301f133fb0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIR2470310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a5aa485b7c5dd292f4426364e3265bcd391071e2d3e4e8700a8bb3111bb5e6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIR2470316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975e83378539ab9566f0af9de4b2673e5069c8c307639f1bd023f53a99165a0d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAIR2470396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c3c8f8aeff31455452c96623e9ebc36aea72feee67832b13b6806b66430b43. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAIR2470725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37b36f23853e12b93a8896c8dcce4f8c7f70f49b82a25328c706d0ac151abb1. 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/TCAIR2470733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235decd0a4c46d8eeb0ee07919b6e56cf4877210f4744770a824eacc4d3a3027. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:25Z), 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/TCAIR2470750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92edc38e612d024077c1da204b219330f273c4feb019df5df928db49efc06fd0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIR2470784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74960e51e040de799da84a5deceff6445356a4e74bb2b312364e0ed5de7d771a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAIR2470817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd698672b9140ea0561ec2abb85f0e2b8482aa542cdc44c36bd83598d4cf60f61. 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/TCAIY2428151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce5e4e755e9e71f1a3a79dd3a053f6217ad4f99e219dd4078bc1e25f049b80a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAIR2473284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bafa83e3ac4ac2e3fff8c3a8145b81fac92b3054b2a047d5dedc9f7a394389. 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/TCAIT2473308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e326001fd2f0c659004f0407e23e9ba5f44b73acf0e81b3498026d6cf4e195. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIR2473496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7bef630054d658b704a3807ff5eb073d7aac4629fa460efc19f924fcb0516b. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TCAIR2473503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d571a91e406022f6b7754f6e9a7e2f908bbc2f52f38b1451e1835b8d699a24. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAIS2473518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e795333611762a80e9f9d936249dc9eff5fffb7c2ce5789da05c0a5983db00a. 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/TCAIS2473534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d903b0dcef6c4319a69b35826f4b2cd7b1c0eb323771757b29c9308a6a7760. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAIS2473546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b77a5dd3a812400198042837855480da90fc01ac224be572d7de03a90faaef0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIZ2412420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb27c4b15858c45f031e42c6d5fc4df499d797f0e820717c5544811eaec721db. 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/QT65Y2543803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625ba92bdd6b3281e538beac9ab2862889a29e0cba6a2c0bc6c4b801ea37f2b4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT65Y2543518.