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 0x77124efc2f3aefa64283c62df62ac9ba51c9e15bfa2f8134569c512d0aa3cc32. 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/7ec29c84-8dc8-48a9-90a4-8a6ab81f5307.json and https://artists.proofprofile.net/proofs/artist/7ec29c84-8dc8-48a9-90a4-8a6ab81f5307.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 0xa0f996ee192896e19c88e234a0d0b1f0350712cc73349053c424c0ee9402c65b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ792496662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96aaae771d50d1f9bc9389699a3eb0eb6eb8aec44ae63b8c7f2a54968a8b4ee0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7K2414760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e0dc50bb940071ce500bee1004b130cacdafdf5a2c81cb7c8dbcbd48e36ecc. 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/QZZ792496707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3512a10cf6a625a8d9603a3d98d42646bc8fbd58c8b40b133314e2e751cefcb8. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZZ7K2416894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdbf05539e6cddec4a25127a85bf596c7024fef1e2e15bca9536a7e54b5ff2d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7L2403777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878a6c9c1715165a5311599553881ecbcc36a37d2543a5c66d5c714a10df4eb4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7L2405421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad270a74832deb60913f971a28f3e3a283cdc49d7ad762cda28ab491fca2384. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7L2405446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bed17c9d06f04e8a5d0bb209e81d8a4ca8bca1e7b83be602f0cbc9e563737b. 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/QZZ7M2446381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a259b5bb959810781ad731c55d7c14f26832331f904d2af32ce8bdf67965ff2. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:38:12Z), 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/QZZ7M2407457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee30da49a926b2dca8951b07b38879a9855905de36db2c933cb54e36122485a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7M2453668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780b22b06ffeb004963536f3e0b48db1cdb422ca7bafd37f1131ad4b34f01460. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:19:11Z), 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/QZZ7Q2494894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57ed3f2bf1f3dcacbc6027926deddb70d9307b36b1cc836d95edbfd2990a01d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7Q2494892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a30f38cc327204765e16428e395b42dc4881acd78414d1590c83f17ce55510. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:45:27Z), 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/QZZ7Q2494881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ab34cb340ca73f891805d86bff72ab67544079932630f2d30ce3d1a0ce5241. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7Q2494889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46817fa6140eed8d5e10b43dd37d37fd5ffd907e0958a7f5245ba0e3dc2365ec. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7Q2494878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82594c6d30dd9ba36fcc84779336892dbccb40028d4d8418afe9b501bdbd32be. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZZ7Q2494885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4641316e58ccd93939573086586b19fa97a41af3f299a425db85067e4136c41. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7Q2494891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b874b753215d3a15e0b48e0dd42f3cb2077e5e87ff856d752275c3be09ba5c4. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZZ7Q2494896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ec0e5fe3278f11a7accec330aeb4e4ab5a61a45dc4b7695949a721692f5a5e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7Q2413246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98faca4f4e8acb845c80c9c376a9ac92f6438efc45d36eb22de3ba26868ad047. 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/QZZ7W2409720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549380da66663eb062ffa4ed27792798518253ca1eeb9bbfddee6f65e13fb5d1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7W2409726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba0affb3f3f82618d9dca82cab1504ad668381215fecc9113b8be044ee1a899. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZZ7W2407690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665da7aaeef60d83887b89bc2bc33f322019a9831953383a4d44267bf105a42f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7W2407938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a7042d68da7e00082125247fd50532e66bd4efcb99d5fb62394d96adac72e4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7W2409705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97d94043e62d8190d58f2138743b3fd00c153d65f4289556c764f0192b2a3f5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:11Z), 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/QZZ7W2409702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4185b8c4c6c5d7259dad0d94ea1a41f1f2d99e9c68e7e7ba3a6b3e010680c3c0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7W2409719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437ea96c51a2889fa0c5c056137e2b8e3314d1eb377e07694cabb8a8931d0276. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7W2409704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf031258c34998467a6d27ccdaccd4bbade484a048de1f9317c46b3c11590239. 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/QZZ7W2405719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d464d15954b2055cc042b3cb7280d3c352b63bca6ba74075ea1fbf00116d46c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7W2409708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a84e2845456dcab90ebe9fb4f9c747c5233429ca53889ce654c29c1da8d78b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ7W2418645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b82b282c1bcd1268e281e007f65e0317026fcc4502c478588afcbec8cbbabca. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7X2433005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bce4fc23d8e5e32e18c7596909d16a0f1a289a50ab142b73acbbe052fcec04. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7X2433009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe72d85243e552e9969f87bf752fb66caa916d9340e05a4a51a4b2c3a17f440. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7X2433016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf0dd07782d488aeeaac2f6393b5711a3f27295d891dce9850f815d5559fc7b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7X2433000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e09a3cc51e5e23c4e2bb2b4398fa8ffa896f39275f6be8ec692fc149905bc5a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7X2433018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a10178a394f8c8d4dd4633d7b299f8796808e78d348375b03888ad52fcf144b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7X2433003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa060c8fa79dffd2eaa64aa4f4c1cf064e57b031665cb5c723d05181944879651. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7X2433010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc22b12851297146d70aa2cefb5f651818c97e0a00b2dae092d58ba25bd6dd45. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7X2429616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2486d6e4323b18a4c2f12078668f96c3627e9f12d28b82dfd2c94377368d7a1c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7X2433001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61c80690a371800ac5b478d22f65b57dc8771db67a65379edcfd707831e75cc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7X2433017.