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 0xa97792cfd8b361230b4a7ded8c3472b30a00406dfe1d0e7494c6f0244cd1611d. 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/d56a6757-8c2f-40f3-b217-4666742535f8.json and https://artists.proofprofile.net/proofs/artist/d56a6757-8c2f-40f3-b217-4666742535f8.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 0x532e08a3bd11fa199643066253730e6980d4bb16deaa8a9f2a6c5aa79d75809a. 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/GBLFP1765226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3be1ecb601d0022189902d6584904821b1e9114dcf7529bc5068a0f43afc2af. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCADO1885204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490055dc3a5ec6c8d536711a87b2032fb8275a8deabcd1232152d7f54e53f10c. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCAEF1977790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf574780503425307261cbcff28c838b0e0c37b4a740b89fd340dfdcf900932. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAEG1984035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9c3c0e941cd57c422a80af314286f65ce1babd278066d1f0fcd45f9e10bfb7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAEI1914856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40836ceb442ba2d93775953ddef6b070935eed280b8a4c0d935496481981ad9c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GBGLW1900563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558df9d5b369caace5142c37574ea44fe07bffc84984df4e7d2288e6720adf99. 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/NL3BN2000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b13fda0da55bdeb5d858d65c1442e5f2ff8ae1349f6f04483e4e4e770535c2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZFYY2184751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6becad43438cf4cff705fdff2a055cd4c09c0a87abfe63f8497e935037fb0563. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCAFO2180309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec33570a5b6b00d2bcf43120a0f28199a1ce67b37f1a0dbf3744d64189f7f9d3. 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/TCAFP2194581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c769b4b94d8936636f0817ede8c6d0425524987ad7ab2725037cad7e725687. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAFQ2178621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b96f970893ab7ccf61c2033f8b912f78133706419e4fa764d9b20a2b011e67. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAFR2134606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77d0dd0a5d7cd0b2cf51d1676db2c6af604e04a3e25e7a8af35a9b04b33ce0c. 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/BEUM72300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aac60f07c864da520e31ad9c1f295af234c1ac38e71dae1493c0d8a8d698af0. 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/NLG662400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39035bcc316854a9b250f70c2c7e7c5cffc1f074071a8732a46bb62aac9f78c7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73902b2caafc678d772d71baa2fcbbcc2a026dad708cbbd8351ac304a37890bf. 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/NLG662300633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aac7105e4a93261f7ecb046407a324036dbab0cff47919ad30eec797f11dee3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0109090ba03eb02eb7b26b789b88d4ae907d5685a02398644a5863e2af6b30. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b0eebc57322bebb5154b53de8692e6e2d35160964a14c587918a220d3eb2f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662400272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f9a7f111732fb880e4d70a5c5c009305d65970fa9f031458f83329e00ad9f9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf64272fd34c639fcbca8fa93c8b7744d356d106dafd6604f77a53c1700b992f. 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/NLG662400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce37447dd183188b19903ea19adf1b858fb37a4e0ef1f40c2b836f337673093. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLG662400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aac60f07c864da520e31ad9c1f295af234c1ac38e71dae1493c0d8a8d698af0. 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/NLG662400249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40937228158bdd1d6ca6b576a5d44a74e41ed4d21644c1665d63504f7f56359c. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BEUM72200262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73902b2caafc678d772d71baa2fcbbcc2a026dad708cbbd8351ac304a37890bf. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLG662300633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aac7105e4a93261f7ecb046407a324036dbab0cff47919ad30eec797f11dee3. 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/NLG662400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0109090ba03eb02eb7b26b789b88d4ae907d5685a02398644a5863e2af6b30. 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/NLG662400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f9a7f111732fb880e4d70a5c5c009305d65970fa9f031458f83329e00ad9f9. 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/NLG662400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf64272fd34c639fcbca8fa93c8b7744d356d106dafd6604f77a53c1700b992f. 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/NLG662400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce37447dd183188b19903ea19adf1b858fb37a4e0ef1f40c2b836f337673093. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLG662400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d6127acdf6e4bf6ea3cddc046f7f03456dc115c84892fcafa4587318e6a7aa. 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/NLB8R2000316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77d0dd0a5d7cd0b2cf51d1676db2c6af604e04a3e25e7a8af35a9b04b33ce0c. 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/BEUM72300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da59fc3eb5e280f762ff2e199453dbd73462afef06c96e25b0ad8a088adb856. 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/QMDA72295697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec58b03f4f8e45e43b67022fddd8e15d2daec54b2395fc535927497214aa6ac6. 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/NLG662100419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8010c166ac7f88b3b5e709a9de0afc8f7c84e9838c8ffbd82dea3aeba4bfac78. 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/BEE202200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681a98c6912c4aa3f2500a434ca047e310a384f840f5b49d35e4cffe918970e7. 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/TCAFC2049988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0a1fcb8439b98e72046796ef4c651667723d7e29dd197ad8cdf94ec6d665a2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFB2016694.