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 0x2e8f2e1dacd2e7e0422981eee9133ba3d1b7989e319fd2144984cb47553d01c6. 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/f50a321c-b611-435a-9bff-ee127055041f.json and https://artists.proofprofile.net/proofs/artist/f50a321c-b611-435a-9bff-ee127055041f.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 0x2e8f3c13f23118ba04205b70f07dd97c0562f551cdce7f4c3dc9a2cbed8a69fb. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/HUC251400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed05f259935f7d21f9a0459afcf0a15c2eaf49e5d2721a17b593efcf2b863fb2. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/HUA611402684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000f32ac4ebc3b4e028a19da177d9f8094193c7c74082a85ce597c2c521d1478. 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/HUA611402683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0522dad6f2bcf86cc1e96729274e6cbaa720363ef9567b68aa6e21bd0dc0f48f. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/HUA611402685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d0ad74eec931198bc932737730581e631c0078a4aa3576d421f90980ad132a. 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/HUA611402682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68531c395542c29fcf4b601f122f5f1f40c815c3da9a20ae3a63af0399cf4207. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/HUA611502059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fb31b6366d6345aa1da38ba441977c0c1e2d34e1f94bce190da07521e6c347. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/HUA611601511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40380a0c663338f1447db4be2bda31aabde71f8fa12637792062865bd2a36a29. 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/HUA611801219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b18e9d8b9300711935d827a61cfb9d0fc5fd766bbdd20ae42c29784d606907b. 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/HUA611802792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2062fedc03869202c1133728a6f8772a9a6db1a200f7ddb05fa4f3bed1b3785. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HUA611901485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bf04d0f0c8167be47d841dda74eb8cedde283ef5f255b39a70c932e2163a00. 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/HUA612000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139052dee699dcdeaf8e37087c2ec3289ce1ef8e8cda1afee13de89770be3b98. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUA612001337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f8aa71fe6a6ebdb0507421b92896ec6b9f3262ad63a7cdad80c70990161d54. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA072171829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6044164d6a48b431dc76ea3c8fda98fa7c29706f8e6b40c34a99ed36956e9e66. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/FRX872127893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3421f56d7a5f0194bb0784133d0d96eaacad9b719126ed6e461c7ed77ef3350b. 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/FR10S2209974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a811956941ad086050ac04f0c904a184620db84798f0b5ac18a176587a8dbce. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FRX872317044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02db0748557bc848f3d1ff367605e21fcd5e34bd8b276f2d73329cce94562911. 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/DGA0R2321070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b18e9d8b9300711935d827a61cfb9d0fc5fd766bbdd20ae42c29784d606907b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HUA611802792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0efcd9474b21b5c1933e739464805790188f92ba695b853f1ef4a0f06936a8. 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/HUA611500460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a8e25e028e65787e924860b30f08000b0b4665899444f40727af28a78fbe43. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:48Z), 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/DGA072347119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde29c37516f49869dd8e1a2917e0ba7c5ea127da4dfb3385b41b7b5edde93dd1. 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/DGA0M2424060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ca3f5bbbdb95cfd44e811175caf422523a405ec84c674f8422b66bb689375e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DGA0S2419358.