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 0x8f0f867ffe138f0efff1683efa02cbad452a706cde61995e158647b0dc9e0db0. 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/b3beb9f9-5c9f-4642-9a05-2a385f090fcb.json and https://artists.proofprofile.net/proofs/artist/b3beb9f9-5c9f-4642-9a05-2a385f090fcb.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 0x85af1611b209c85fbcd7caf421e65d75cf360459ecad95eafe46888d3c7859af. 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/QZHNB1934824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61826f8c49c5de485efa809dfbd8d0220b98dd0176e78d8aedd1b6843480f56. 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/QZHNB1934825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8df9c46d05899fd5de5887c95532a1c7fbe4add327750b57c571fd658caeda. 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/QZHNB1934826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64430f8107e7e0b11bb28c86a7f69455c66559d7011cfea6724aa57e3ccd084. 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/QZHNB1934827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9514091998c38b010f0b992b6e822ec17a67745ecb2b1012ba32ad1daaa7b3. 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/QZHNB1934828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba4b167ac1e450a8c0f0be50e5506bd31020643f650bfeade82be1769a5187d. 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/QZHNB1934829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196e222072f51073ed203fdc90908561c6bf3a10a3f906bfc6cc3beb559e6905. 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/QZHNB1934830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5988838688213b7daf8d9400368a3bd0240f1afb07f0b03cf80526fb5650a997. 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/QZHNB1934831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057cdac4d9839c3d4ea6daa8e93abe5a3d1077e19a84c0e827205162bd9b55ce. 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/QZHNB1934832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc594b923586d3ec30474a9ba20670eb76bed8967464a108cc44b399746e6042a. 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/QZHNB1934833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe419ddf79008264370f12ef71ee87340d38c4a8edf6972a07286e0dbc551c41d. 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/ZA0W02100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c6ffc00dc2423948b0bc9682951be693c9b0d372c6ca1494d3eeb23598a18e. 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/ZA0W02100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f401c05d0c2547a43ecc26ef17b4a0162eb89df863de024ebd01a00866c9510. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZA0W02100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c12dd337556dc146a16875b7e08e35fb5cf8d3b40a1db76d63fa9d0e468879. 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/ZA0W02100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81095f6b897d4038e6751d737311e9a0728566bf1ddd5d51b946373735b79c1b. 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/ZA0W02100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb919c9bccb2afa73749a43b8f39a7c91a0f2dafb54d5dffcd0330ad27c2ab9d. 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/ZA0W02100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe419ddf79008264370f12ef71ee87340d38c4a8edf6972a07286e0dbc551c41d. 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/ZA0W02100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c6ffc00dc2423948b0bc9682951be693c9b0d372c6ca1494d3eeb23598a18e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ZA0W02100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f401c05d0c2547a43ecc26ef17b4a0162eb89df863de024ebd01a00866c9510. 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/ZA0W02100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf577fc4ba55c70eb85b18e36cfd6c447ebea617856b8e58435bcaebef28e2aab. 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/QZHNC1942230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0f797b9abf39f64bb64acc28ab3a66f058ac2308e89f342dbe202f328c06fc. 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/ZAK281700173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b57bac2d4c6c557766fc9c2ba0a7802546c6a1daff38600a4d65e2d30c5646. 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/TCAEA1841099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13052d69edabfd695f6d67527d9e61b8965c1eec6159f6975c721f465ba8f1ad. 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/TCAEA1841103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3fb8afa3aae296eef15caaaa674def5a8faf83fb6508279aaf896b0da0a9be. 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/TCAEA1841105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2485c86e8a992bce312032a06699a6830a9e44cd0aea2d9d6bd3ab0d9bcff579. 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/TCAEA1841106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1105d09e138c323271f378a11d16d2cd84c153e4da769bcae984299ef48bd49a. 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/TCAEA1841107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e95fabd6f5194190f46e57c28dabe4bce29e4c933b6f8f10f807443e5ec1d3. 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/TCAEA1841109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337792ad86fab338ed0580e8324452152b3135fb3d31c746994a080c04e069d3. 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/TCAEA1841110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590212399f860c0dec66f6f36bb61f180bcf81df5efb636ac4fb13b233514ed9. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ZA56G2300018.