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 0xc16ef2f657c34f4b6882985902fe449316ffb18fa6760e19a9267682f40b4d87. 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/00aa0685-7a9f-4c0b-a648-53dfa3b52ca6.json and https://artists.proofprofile.net/proofs/artist/00aa0685-7a9f-4c0b-a648-53dfa3b52ca6.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 0xeb691f774ba68348ae5b8f36a9b7149c1a3f1bff32177e0a2f9b7052186e5613. 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/TCAGM2291002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed6fcbe9c376add8849fe325189dd1f7d7b82a37d566647b40e53a6150282f6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHC2352336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7bfcc4860c7c63f06743a4c9dde216aa2b12aa65eaeefd2163b3484241c752. 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/QZLBC2401033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d238a55d12f322e79ff99372d0db8ff110806a54d85f454cf6ba4299aced98. 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/QZLBC2403781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea68f17c68930340d5542473c496f29cf99d8e4ca15878dd1d52a09bba6a2ac. 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/QZLBC2405794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83244d6c368c4bcd2981be8cca6a44e2210b36efad40a4a00abe2cadfcb37e40. 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/QZLBC2411260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9d04d0a50077c6861932ced71a758bf6055dad3ddcbf0f4a9bdfc81cfb7bff. 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/QZLBC2413988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd806aff07572578ae67e2979f5d795a52c534d5c3e23e87b6da73e465b5d4f. 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/QZLBC2417806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0879986a681766a75d2925f535066d2309552da158eaba0cbc4abebcb01aac3c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA0R2411441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4396e394a52bf91dad19dc4bdc08b3a66d45b2f99591006afdc34a0d22593c6. 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/QZLBC2502313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6594db160dd0cd68af3761de54799a65943b75d0865d9a20a7a251156c0b13ce. 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/QZLBC2503549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad28e042e3e3fb6f8150949458dd2de2dc5abe0c09d19d3dffa08000c9ee6456. 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/QZLBC2505454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de114cb57b84cd29c3a55fafcb465baa525827d08e64e95a15f87b2f3d426a6. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX872501364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f71277389cf0606d4222414d9f4573caffe9a5e07bd2a3c1ef6e4a3d60c35dd. 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/DGA052523207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aa8c3586ceb3a73c4b915774a1afaeb7e681083887ce849a1cc73f6fa66b24. 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/DGA052569080.