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 0xfdeb6985e82de2328ef6c3a186da6dd12cbf708c112ac2c2dbe2b6e8e5a38d71. 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/877ee0a1-a9b0-4533-a3c7-3b76b9eb5f3b.json and https://artists.proofprofile.net/proofs/artist/877ee0a1-a9b0-4533-a3c7-3b76b9eb5f3b.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 0x16fa843187d5af0a31327af13b2bfe5713e31fd95c50f533fa2bafafdf4b3cd8. 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/QZTB92307947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6048ce71fdc4d5b69e016a365290f61bece253824be0b7739b397e516b7100. 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/QZNWU2391818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9486f9f9786d0ceb5b97e8b67ca499b88f7e0edf413da18a07f3b055c480a9dd. 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/QZNWQ2307126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590708ec7c97bf44997bc9abd9ba7d9878c0a5a48e147db4163853cce3b0a9db. 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/GBLFP2353884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3109691c597b2dd906a6b8684a9ef8fe5b017fa7b3c9e99703ddf62c6386fdd2. 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/QZK6K2368826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb1b4c5310c14b46dbeaa444119937fe014393081eb6a53729ee02e2dec11e2. 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/USZXT2351314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858ff47935a84f689f007688ab80f17b8bfeb21c71318f133f5434db48eac77e. 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/QZK6M2314966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0fb5792f9391e679d0f207bd7ab86db477a5bb4f2b0c0d17c0d36e99021824. 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/QZTB32232050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa7b684a4c5d57ae5f3386775503cce2ed4cbccc5c0334d5a759fdd3f5c487b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZRP52237088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87da01e2e8a2dc0194cfc7b589d4dd09c073b6685e0349ad36a966e799ec0694. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6F2273771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2200cfdd6b815b95779b8176b50263c8d94d415ec0841d80275a9b69d7831002. 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/QZK6J2280468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c55c108769ffacf3bbb364e8f4991cff926688b49003ffde20cce375e6edbd. 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/QZES62271169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf685a28a1090aae6d53d7332ee8009794291ef67eb3b0f214ee83d103d86fb65. 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/QZK6N2118766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b118c51d754c3154637f9091e9b84508f620e974972afdbdd25f410a240dbeb. 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/QZES72193445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c74d5e4e1ab9c3a9619e7aa49bdbbf7fa05bb6d4c46cf2cbd29e428931556e. 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/QZFZ32038292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d57bacad874a68b9aef6e504a6f7568e15c7f99e62a4a2a65d42bb9870c5a50. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZFZ32038293.
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 0xc8bb7290c5174387d4cb4972170eb8c51ab21f70c4b779f377eb6dd6556a52e4. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZFZ32038294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63057c0317dde4ec943e967c7c4a4a1912ef12854621d187ac5f621e3c8eb37. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZFZ32038295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c1df6bf3ff9d34aa50f7b9e945c8ce44220c1509f9cd5e188cbbd1cf6a56e1. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QZFZ32038296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c700e548654bbd5ae8a69d1d163141afdc719aef5b5c7b76b1552032a921320. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZFZ32038297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe538b3d3b2726ab08a0c65e1cd3a235a9816b7928eb43cad252822f576433eee. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ61950834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1334dd50d105876bd85cb103fbd6129f8bacf6a8932c0cd27393092bb6f699f0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA51844101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a1c4463b96f0f923d00ce01fa888f30dffb95542d261c383bfdabe74dd94b2. 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/QM4DW1833572.