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 0xe5d785c228e52a8fd50674e0fdf6823a2dcb11da1ef9fd72ce635c274f8fa034. 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/0af6eb1c-ad25-41eb-a687-7411c66ccbf9.json and https://artists.proofprofile.net/proofs/artist/0af6eb1c-ad25-41eb-a687-7411c66ccbf9.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 0xf8a2c1e892dbf3e775f4f67523bfb4942bdd277765f635666b4b35299009f3a5. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/TCAIZ2463316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d80233f6b509fbde8da41ebff5e6a4f789a4c05f4fd9201072bfd66dae66493. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAJA2414436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802260436bce1392365a3f581acec2e3ac961d50a2c16639478a8ce6e554c1c7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAJA2420908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2218c83dc61e113029d8ab24574dc58635bbdf0cd34bde6c856d64aeb73849. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAJA2429680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd1eddd83aae1f6fb012982f4a2db7ccb3bb152b1474790f99eef7740a8348f. 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/TCAJC2441427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76edb8bfb6c056c6f79c52282facd68bebbf3914f2ab7825262fb501ff55669c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCAJB2448668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d3aead4f1ac579da27aa004346fcf576f3760fad5f39bd1b84fb99ee407a1a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAJB2456908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb604dc7624f54fd1adc6aa243f8aa6e811a245becc90d0e9a6f6c11588c1ae24. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCAJA2469593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b2360ff8d8a25a91a0be9943c228278669be96625d115ae9b33f6b017a812c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJA2488797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76437efb71c9c5af6e72a51b8c9d373e9542bfe236734b558614710f6c5d19b1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJA2494246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7589c5de16222b4286cbc0b8587ea68c24c4f854fbb3d97257c4eab13b18dc8e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCAJC2402465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355dfc578de2d0e4c9db97f572582872f9a0313d313f76d875d9f21eb5a161ef. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJB2414964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ac29954e754a79fceba40ab102b756e3651004ee8842278e7db72a3f36c964. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TCAJB2421208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0015579c86d6e65800a856274c0662e85ad990e8e602df1c50ea026308bab140. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCAJB2431861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259e0a2f25ce56b9d0d4aebdfad15521ccb2fd63f4fe70c5b3c3d5fae9c12c89. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAJB2441281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebba7af1f4d035eb467c2e08973cfa638290d58256b377126207e50d4feada9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAJC2451312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75378e5840e5d204b95fbc17f1afe4d0ef5a00cc50d3c05d9bd371cb69713d10. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAJB2472578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d553516fb0ab92e0d7d8506b9f0be5635bc145db130493b4e7169e65c299d0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCAJC2407578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051d04b22beddf04b283412b2b18e4d75a95274f57b7fe1730cd40734b9d3f56. 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/TCAJC2407612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf26f3096a3747b8a1c0ec7b063478f5fa671e64aaaf91ff72c93d98fa319df. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAJC2407649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2457b7c7e3b2db38866cf70481998c075b4c0115693b6ff09cc7ead73c8afa36. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAJC2407634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcab940dbee7c8c2305d7b37ab01e085ee9506f01e397608770caadf35c69e2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAJE2407626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b018eab6c682516809856190f34f5a585b157ee178c3425a5f526d3a87204d9. 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/TCAJC2407610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1890d2485257d6bd1637af82265fcc099078c13766ff13316ce5e46e9016957f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAJC2472656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b60090bdc48ef5cb5303b6f63edde31f350a6a17285ca4245208cd4fae3fa28. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAJD2472723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c39678b649020d6a6c25d0ff33bfee04e4b09d88a6e4f0fc52517ec914ee486. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAJC2472650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c42bbdf1ef43df899a66de2d558a016e8acc0a8f8e38556dc0fdcc23a030f4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAJC2472693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577367569fd3d50e88d928c472b785b4177c90389067a9611020fc513290f3dd. 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/TCAJC2472707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4696df8675e3ad0d777044dd09729bc520421371ecb57eb79605d4db825072d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAJD2472633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ba16accafb6bfe6af01dbb42362c092eb0b85add4397811380f27d25cc2c5e. 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/TCAJC2472643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6e707312b10c9c27257e6c724a1bcc0f3100b56c6793b3d722cb018561122. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAJD2419214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdabc707f5e6242f9cb1b91e57d73c4f5fa42d043da1e2ebba8162859436cbf9. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAJD2419254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0ab111c4ea1c4db6771a41eb095a9a4676b6e73504e2c63e417e15fe0c3059. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAJD2419273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bb5ca978301a6ddc035ea218af16cc3679553ae9d878daa798f01a4b8e29b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJD2419289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036ec029e54d62c45093ac044f4a3d1f9cd501fe29f55147dadd84f9a35e1dbd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJD2598362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8589f042719c613ef52304525f4dbde9ac48c802fbc4f2702108e017557e33. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJD2598348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead4b0e20be59cf3a00c4da5b00d31d8ca7cae4f56d0d35d95b4ffae4afcdb5e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJE2554631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a6f95ddf4b1a19339056a5ba4377a5094aff9362d704543c4529f863ded000. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJE2554572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676a9d7a7575596dc10be5827c8ef0d98a76a66be05dd89db9450eb3b8952081. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/TCAJE2595601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd0980a120b8a0fddade6dae48cfc73fe4e8659f1981107748d891cbd41d1e6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJE2595566.