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 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 0xd07ab3eb747759203527e210c94109d4e683190c4889c636dac0de6acd7036c8. 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/51189596-d6fd-4ea0-9cf6-5268204d40e6.json and https://artists.proofprofile.net/proofs/artist/51189596-d6fd-4ea0-9cf6-5268204d40e6.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 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 0xbcf1c11568edeba1eb6129889b2b01468a821ca995ab0447ca95561b9e320320. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FRX202135030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bdbdd95373086846fb58aba9b85792b5243275d478bea62a4032e13b2ba8ea. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/NLUM72100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93faf4c0388ce749b9db0e74bc0bcb881b21a5231dc8f34971bcc727274f1e17. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/GBEWA2300921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb399fbb7478c94b37a8d90a763f37d0f666b5b68d24156360ea59c5b5515195d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBEWA2403402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e94c932047aea2b4e16ca9f53852c08279650869f95da1506e3d574d37c98d. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GBEWA2303950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93faf4c0388ce749b9db0e74bc0bcb881b21a5231dc8f34971bcc727274f1e17. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBEWA2300921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c8bd94d0fbeea6752d1d279761935b61a67ea8bc0936b9ba7f50bd42aeeee1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBEWA2502370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e94c932047aea2b4e16ca9f53852c08279650869f95da1506e3d574d37c98d. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBEWA2303950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b23ab9e6bd66d06925b7f43e7f871ed92a8c218d372131bc55f58e7bb3419c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBEWA2503521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f3911bd89ce118f9d2cd0f204972ce7ba1618ff1f1d2e80d106d6bbc20265e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBEWA2503520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c78e7d8a4940e3dd35f80d6b7131560000d91462bee57eee81784180ed6aef. 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/GBEWA2301586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a325b9cb05a2f9bebe27162f06f50cc47d879064268175839591ad3b9cff93c. 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/GBEWA2402206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffddbc1f8ecfea800658c12ab2e1aa4e61ffa03c954ea0d5c99d88bbc309da6. 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/GBEWA2304539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666a0c539c3a202341f880cb24827e3e6b0863811e526801b9d709b63b78ecce. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBEWA2402352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c492e1d7afa038a91b19fa43b33136091d81a0b64ea5ac842fd224ce741ac8. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBEWA2402288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9138eceafe45f5624475440f27318f3c243ec38416428c3b2336120cfa519e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBEWA2304734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd554c7a912b0c80665af74fbec1a29952459f2852867fb7c2d787c27cd73174e. 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/GBKQU2439986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4c75688dca1e86f27183a494e76219eff3552ec1e50c5413defe34c3cf8bec. 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/GBEWA2400252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f02ce38f1cbfbaab43a64ef7e7036d55c865bea51826e8ba486ff0248da01c. 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/GBEWA2400261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886404b532e22b75d296661f382e27dca5052f660d46ed82d28ccb2e78acfbc2. 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/GBEWA2404375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d594b26fca81e1dbb34eb554fb2a103a71404ee28ff1d5530bbe867297aae63. 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/GBEWA2404308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669102342bcf2b0892cd230b1ac07af16255d9af6731d9960f144dfd90f9dd1e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBEWA2404103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f43460322b686d23a3d9a4f41bead7dc598253840411dcddcbf135dec1b0746. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBEWA2306768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e94c932047aea2b4e16ca9f53852c08279650869f95da1506e3d574d37c98d. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBEWA2303950.