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 0x700fc6a85d2c35b91c7dffdf64ddfac87835690cdc767d724f3d3ed0560af1bf. 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/beaeab22-2dda-4e8e-9604-165856675312.json and https://artists.proofprofile.net/proofs/artist/beaeab22-2dda-4e8e-9604-165856675312.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 0xdaa9062ef6b20d7f5f7254f6c8cccaa57f00f972f2cd3e34e6fb8ac2fee63fba. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:19:06Z), 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/TWCT51718425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92302adaeb629c72f3049e0b65cc8b6247b646e90246cdb6fd0db9123de9b4c0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TWED12000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3daf80bcb0917861caddd1c3ea38eb3df71ae5282848fb6707a58844d3a0719. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TWED12000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905275b5f7cdc62704497fd76005d7e60944c4799e13afcbe87342779a6ee567. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TWED12100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744e7a12196a561b68460769756caab4f77967479f58d11dcbac7a721723fa5a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TWIU72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64527922079412aed7a6c99013373392207e93a99e69b1c02efe8c1c6ccacb8f. 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/TWU712301516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e41a23f1870c6e44090d73ec7434e14ffa2591b6cf74907d4f2c49f1b5a0182. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TWIU72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9ec30f9b33ae97188895763ad25afaadb1bfdee84dad2ef14b5b8e69a1c7ec. 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/TWIU72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57467c1d907bf4d71c693960ef978f5f7cf6ed07a650ad4b33396c161fcd2654. 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/TWIU72300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744e7a12196a561b68460769756caab4f77967479f58d11dcbac7a721723fa5a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:47:44Z), 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/TWIU72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64527922079412aed7a6c99013373392207e93a99e69b1c02efe8c1c6ccacb8f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TWU712301516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cda60ba4cdddca1ae00c6b1e29ef8ab43343b1f8cbb46b06fa00fdf9a8a787. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWCC32311431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9289b1404e3664930f52d08c5c58066d7c4a5f1ca7beaa6538f41fc726af13e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWU712201341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6b58a84284f0a672fb2bf9fe1dc75f4448c6f389f8e1e233ee31227603d62f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0T2423558.