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 0x7c59b48719bfc5886693643323bed4d70af137bfcd2a4f23a134fd3fd3b39ab7. 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/6346519e-250f-47df-a101-181348242ac6.json and https://artists.proofprofile.net/proofs/artist/6346519e-250f-47df-a101-181348242ac6.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 0xfdfbe30a1f198f8713773bf339d22c9b07dcb44e208c8ca74e5249f1be090993. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZFYZ2322293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce22ea42dee5436a31f708698e6e31f2da2e9e4c8dcdef817603eec67ce21803. 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/QZHNB2466506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9e48a4430f5e7d1b728acb6e97a84a17e2a121745cc5d23c9fa039b180844a. 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/QZDA42461506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a95509c7e32a414aa4be0e9fa18528143f7f875582bd7f88cacb861cb97009f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNB2466507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f5ee572f8a136d546a3cedb75e01f311d75f3a480cf9dc92312bd24b202653. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAY2306148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820d5476329a92537a6972af8aacd7387731aad606937223c247ee9408cf6791. 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/QZHN42438741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6822350a4a46f6016a2f5a0509b365227ef7d6ce014964f23c0f962de64134b1. 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/QZHN52374107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcabbc4776c9c6aad1a4d0881c109e09b810f46be2adb6cdcc9ba06c3e7ac9c. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/QZHNB2466509.
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 0x2cf6322d442244bfe95d9a22bcdd1a16aa4a31705142b51c027835784f1ac748. 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/QZZ762407250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5f324b092b3f4a6435deb05f9342415616f10dee0a5638066745bcea176fd3. 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/QZES52591076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870d8d346362d521cde0133876ca14f01f154015597e20a4e5b5925f7c6c1014. 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/QZES52591077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ebe7488271be768de0bac525c64ade3533c0961a3538954d9e6b9cde2d35c8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6G2475082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaffc966f0a2a7805343b6537a45febb91df612f78dfeab9efcd925f09b5b5a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6G2475094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac932882d709a824c1ab73bc3dd4462140cdecf5deff6dc6c7817356d7981607. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6G2475079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15042d8c2a5a584bada1798a39700fd8d4df96bdf75ac7fd178dbd647946257. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6L2465490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3e4bd96ea4bbf3f00dc00e69c49b98e26325e9b8d92beac616a9e7afac2669. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTB52304244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41ead9a218e3e1ee56a6dbe14d2ff3c69dde8d79942462d365302aaab008b51. 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/QZWFR2388916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a353fa83c3a8aeb6ddf6e84d2fb50ca7297be035b013656d371455161403f72. 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/QZWFR2388912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cd931aa8791dac1deadf0b541c1633dfd3832c01651af4077281fe27fb5fad. 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/QZWFR2388925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d259ff0bab8d01f6b788f779a4eb9aeb38953debb557f24a404ec06d3241db7. 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/QZHNB2367568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044c73757a231f9ecf5af8c39c09ab25f1d97c572b18023eaee7ef96da5acf4c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZK6G2475086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a4daa236387017a1b04a1049224460203560679000a6106dd84e564e0d3d5c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZWFR2388923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e70bd51cfa002ed66a469fafaa1017a7cefb445b706dfc581f263f9571974f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZWFR2388909.