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 0xb37cd772814800efc3d17f67ba25ab1c32eb2e70300d4369800fed67e1bf9c2f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9e299f4-6dc5-4c97-81a7-72a114a4f53e.json and https://artists.proofprofile.net/proofs/artist/e9e299f4-6dc5-4c97-81a7-72a114a4f53e.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 0x74668edeb832ff636f4be0e223f36ad0b967d78fbb27f72f783c588b51f8c8a5. 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/QM4TW2376383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cc95f01a00cf24a8808291dc4f62819bd456639029754ad68edb10fe879923. 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/ES5152300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e99437a95274f95e82f440610cbf4a6dd2d9164efa56d7fa2d64c0dc39dfcc. 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/ES5152300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db9e2dfe38cec5fe2c4fdf2ebe292bef6095c587b862fb850eb0300470415b8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5152300442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518412bf85436a6bb9af08628e0c644872be88e11a5322b4a62aa35480a86a1d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6c9f2ac52d9ee31fda361590d9169f4ac52c5f8600ea8872294fd940798715. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152201706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5addd6dd6b1ef17e337cf1a414efa7d62de4a20bc189070ab191ea61671cc9ea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5152300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bf4dadeb3027a35eda9aa17c3258bc0815a382d95aee6fc19a7202227ee6a4. 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/ES5152300441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7983296f356462acffb5fd589d3934089349f138dd6571cc776376662bfaf75. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152201599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb7d01895475015a04bfaa45066c41b64294375bb423514dc3105b39a7f4ed. 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/ES5152300445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf21a5fcf11ee4cd44957c2d0ea72e6228e0e947427a8e2623a0da33eb59cd2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152300444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c94fda852d921e6e7fc567d1a503681f978b0ba80201f75e50083eda4cf6328. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152300135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0905e886344fa919ecbb14affdaa5d5f1f514e0db1b9763d180c2298a262f3cd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5152201664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69691e5db706fb273f66545636df1354b468d0e00e5bda25dae3cb6b537d1ec0. 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/ES5152300617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d78dd2225819f71dfac453b9d632ce290b2ae4819e62b098b98f9a4082526b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES5152400538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9ef21cf5951f58fe443a1cbd0634be634fb6f26f302f2a266069e43d92013a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES64E2489474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d4cee5eb0751ad96aa1999a82ab5b6e9f739d26dd7e0f0a8e60d372c6a0a47. 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/ES5152400639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63e45be47e6b87630c66c81ef94b8ed0f3219c77de905a80afa541d2f892cf5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c31e60e239fd33832b2c42f5aecb0b454d21b1762fb115efcdc55d16ed2dae. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM4TX2456198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee2cb6a2e54a7fae08207df3091b8866e2a7b7111957cafbcddb55fdff59a58. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA72381392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c50e181c6788729b0c769c09afd235ef34905e39c60ca00019c4a6581c1c491. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMBZ92359170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b5e2d681c4c2150064c3641d9b697bd7dbea8d11cd2f3d1ef4791a0b9c76cd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7282351132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6033a819554268b18d99589951a343da63ea02f3a8b40bc3ee4a338f121838ab. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM6MZ2304046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f13195b3b11d7c25861893e442a42844028bf50dd7679c933f202583f3a7426. 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/QM4TX2328760.