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 0x2bd64728e47e4671fdbbc687098069914de9f90b0b2fdc7248d1acb5d8768c57. 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/571d136e-d0c1-440b-bb74-ad0f71d6b037.json and https://artists.proofprofile.net/proofs/artist/571d136e-d0c1-440b-bb74-ad0f71d6b037.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 0xef34c4691d69a2f8a5cdfb4f2c6c8460b08dd30fdd2497f23ed825bb2058055b. 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/BRKYG0900250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7236d77141ff380245b0d4118f54d9b00aa53b1e12f21f336dfbe676f075f886. 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/BRKYG0900255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe6dadb9c80e15b4ebe64e5743e9b7d5d025802b7ff1802095a1f61f3a561d0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BRHRC1100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6304431713f9be9638830b8ae3bc3ff26a50155222f4445a2493763a3526322d. 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/BRHRC1100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8284f30d30792c42ec47037871f62942a7e55a312a4ae0a3dc3108e4cb99816a. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/BRHRC1100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ac22a36e07563fba79a5241256823e0f7914fbd0b6ef4ae114f5ad5003efc2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BRHRC1100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd725ea668ca7b03e277a65df43eb55d82e2be10c252fd6c698fef184609aa34d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:05Z), 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/BRHRC1100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaae33e2b260164d7cb17330e6da2f40bcf1b297aef7041b5882572d982acd8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BRHEL1400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ac32fd344599c76ad4d730f17f2b1e898173e83aa2ed9b7e16a979c5b12022. 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/BRHEL1400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1756cf7ff7b80a3fa980859f1c1a116d01a0958add330ef38d5e85a75b129f. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZNJX2115056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e231e6cf9bc96bbc5bb6de1ef202453b0565be08e371df4390909d927c5cd8. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNJX2115058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456634420befeb5249b47e441f1b04150288659fed8c4813c8574b24157ad9a0. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZNJX2115064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c05309cc480aced87f63293a899df92a35ce99322b9f136d38062252ab7f9e. 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/QZ5AB2369851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52d9c7a454299c477b6bc263485e8a21156cd9523ecda0e26e8b153e827faf1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ5AB2369854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068eeebab488f0d29f8686515ee01a1833c0863a717e4c7459a09643bbf5e594. 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/QZ5AB2369857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8189e219bd314da37b45590ac7191ab612e026a3fc486d062b2134189b6eae6d. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/QZ5AB2369859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e8ac4f19339058c9569119e15eb260f7d2badda8889ebe3ab7a40112a4184c. 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/QZ5AB2369860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7708ae00bd68ef08ad332f201fbbecde9e894e3ba3d56c3dda3cf81971cb4b0a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZ5AB2369850.
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 0x6fc4cb751ca1005d19880dbaed616e93db446dd0602279c1ffb04ba165b872de. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZ5AB2369852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa35b9dce66b09ae26dff4b4cfe95f79ea5c2e9dbb5083c4b52cd8a6d9ba4e33. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZ5AB2369853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fa55b5a81c5cc6c69f07c16421c9a5793007894e47b07cee20a8dcdb546ea5. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZ5AB2369855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ed10b3707c215bc2a381a6b1a6ae72e1264f8b0c348e45bd78200637eabc9b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZ5AB2369856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c00426c74d92056fc3927fd3214d71f6854d7d431e7b15dbaee7632df2328d3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZ5AB2369858.