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 0x584ff3c5dfb4e372ac312e90a36ba827a91e2edd9cfb72e301c7ec03169e2c46. 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/bfad9d82-ed82-4571-8ddf-594e23f3ed2c.json and https://artists.proofprofile.net/proofs/artist/bfad9d82-ed82-4571-8ddf-594e23f3ed2c.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 0x331a707a87bfcfd9dab29a6d2bbea2ebbe4775b796ee56526e9ab8ac05c09bf4. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/NL3XN2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5601cb5b65d1a31e65adf9438f5d1a2286a85e103121e32e1925b3d7f817824d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:33:30Z), 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/NL3XN2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b87f0411733307064077c0bd0899112e2cd889db82a5c0c77198154b1bc0e0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL3XN2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bdc783045eb49ce9e4d55435317a5dcda508b5837a88edc139dab5653c695d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NL3XN2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45cddb2ccfaf1fb57d8b4ef8c32b8a93277ee5137c5f21e6ead35ebb21dfd16. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NL3XN2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869d2e0e669472a627df55717e3271f496265c4e8b4988e847e855e8734a809f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/NL3XN2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2390d12da8de4ceb9bb78e7194a646fa62d8e765ac571e91e9ed3d5796322779. 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/NL3XN2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e12563fee76843d7e169c639ffd9eb06e1d2d09537417164c08122a6ac273a8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL3XN2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30f4a58616576a65e0a5408eaf0168fe54cb5e3e04b249242cbee6e971dddef. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NL3XN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30f4a58616576a65e0a5408eaf0168fe54cb5e3e04b249242cbee6e971dddef. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL3XN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad7ce3d4419006098b59716ba1f37d455a6e7e0ca3ebcf29ca7f6c57082747. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:03:41Z), 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/NL3XN2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30f4a58616576a65e0a5408eaf0168fe54cb5e3e04b249242cbee6e971dddef. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NL3XN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32132b690c2b99bfb42cc5ade683d18fb006543cfbd7c37ed520c5abc6db779d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/NL3XN2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad7ce3d4419006098b59716ba1f37d455a6e7e0ca3ebcf29ca7f6c57082747. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NL3XN2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6c3cf3933104e50d4b810f5fbc6841a30edf374a1d04f60635af605ac9c4bd. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NL3XN2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32132b690c2b99bfb42cc5ade683d18fb006543cfbd7c37ed520c5abc6db779d. 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/NL3XN2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3046dd28712fee2cba591b18ae0ba026e1f61be295d8df3cf3efae16d3fd9eb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:58:08Z), 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/NL3XN2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b04e9b28233c7362c735bacbe00c4e964747698e393a9fef74d3683240c870e. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/NL3XN2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad7ce3d4419006098b59716ba1f37d455a6e7e0ca3ebcf29ca7f6c57082747. 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/NL3XN2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6c3cf3933104e50d4b810f5fbc6841a30edf374a1d04f60635af605ac9c4bd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:48Z), 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/NL3XN2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13121eda19f139c06118919e5b5793c3fc0710c6075564e8de6d250bc27ed33. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:41Z), 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/NL3XN2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338bff3727c377a74dee786c2db4fe79cd846a72691c67e94596e285d2781f83. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NL3XN2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed186e8be956dfd2f48bd77d1e234cb6cd731ab5f93581b40128d06d33e91988. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/NL3XN2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efe883e5a2b84b5ad82e8c2c4340271a2f7cea65b0a79ae4a8f3bdf4b1bfdec. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/NL3XN2400011.