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 0x406f8a5857cb86e9651d24a7f01a2b256f6a39d51d5a415bf2912f273a2b7a89. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04812c75-0eb9-4b2d-8998-56d981968d3b.json and https://artists.proofprofile.net/proofs/artist/04812c75-0eb9-4b2d-8998-56d981968d3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Boys Of The Old Brigade - Circa 1914
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 0xa1c01ed7a0a2868bdc44a1829c3af0fedfc45ec504b931a6d672fe512a9d5c43. 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/GBHBR0401764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d7aa5df85de403e95feb200e963ce7a493114c96505d3ba556785470f286e3. 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/GBHBR0401765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c26fefd9a1410875f491188c80a16803f80596608db2501f606e6f16fa5e52d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBHBR0401790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f854d07e513731d7febe85c1ca95b18597c084f2b7e39c989863ab3ab94e98. 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/GBHBR0401766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7a333ee89932d616d9fbc2cbf92b15699cd9e058004319d10e2b06627bf4b6. 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/GBHBR0401791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf209d35d0062177603600b5c16075ce2e0e87995d68e1652b418eee593778a36. 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/GBHBR0401767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbe1bf0ca6c1d4d74a572c1b4c6d1a9b47b94d7606a433b112b00e81feb740f. 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/GBHBR0401769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76023296c4cb09ea927947d00d36aafd91a26424d158b81a1bcc069bd8e7fc86. 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/GBHBR0401770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4020ba49ce125cf4ecc7f10f1930812d9cbb173cb1e68f0557a6909501324d96. 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/GBHBR0401771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a543e57b44f28a1055c584fc00bd398a12118b1e5914336a44215b73c528d2. 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/GBHBR0401800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99795f284c8bfcb0a8975e15f7c1614ea797bb39d062111f752d4b6090101392. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBHBR0401801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788348054f639e7d08709fd99189e2047989e2650ed07f7507a5b23d79ec7088. 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/GBHBR0401777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eee938496ca267f11ba7627378f9ca902c4ac1885117fdaee6c462954bee14b. 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/GBHBR0401802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dbb3456cc0245cfd4d1c6110d2c19c173d6afd3eb8f439d247b100a1f1fdf1. 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/GBHBR0401778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fd1ff80d4c751d19681f5c64b5563890db59bee0b20191a27c39a8a88d5051. 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/GBHBR0401783.
When We've Wound Up The Watch On The Rhine - 1915
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524009b8ba79b27269dc3d80a623865a1f7e9b4ee59ef572d599c7de505cac7a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBHBR0401784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62027a7212e195041d3d1c2c3cad9a6d35671f118f3175884ee2fc700cd3295c. 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/GBHBR0401785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc18989ff642969f459dde39ff9e921fe0847f9f37e764a1919110cb2b4a96a. 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/GBHBR0401788.