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 0x2e0dd58b798f0a48a99e13889e02f9297509380da7f48b033bd8d72edfc3e5a2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fbca4df-b5ed-43d8-8752-91b70f3dbbc9.json and https://artists.proofprofile.net/proofs/artist/0fbca4df-b5ed-43d8-8752-91b70f3dbbc9.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 0x86e0fc41c58fd55f2987466a0e0ed416019410613351c9e4fd9341c34cc1c058. 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/BC3PG2404611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b91da6dad9d386b179f3e8c1ac2f03e1a4f466dda583e1bac93a21c8e3c801a. 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/BC3PG2500541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273b387cb0124baf4ec41daddaf4baf76e3d48ddd2e0bd936889d75b102acf9a. 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/BC3PG2500482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d528d6a5a0d5b97b4efd9e0189f27e8765e9ef3adae6c47782dec48ede7b5f. 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/BC3PG2500481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f479dbac404402633bd739aafafe499d5f0ed4dbd62c3d3e5afc64c494f1ae. 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/BKSNK2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7735fcb50b7dd1e53c3a0ef3b9cfe71771c7594f6df9dde509e232998d5cad8. 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/BC3PG2500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc927f1e107820aa5f1b35bb2eb55d4018405169e9f40460bedab83f7d74e74c4. 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/BC3PG2404582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c442c762bc930ea981fffc702a11a21575a46b794bc7beb06636d8b061a34d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BC3PG2404420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6e66f0c30e4aa0ff1386a5d1d940c70b246bcd3a5fc72531b9a6b738753d8f. 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/BC3PG2404464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b3d12f7cd587001650097bb6fa110e56833787e42782b65828b0fb1f8a6c4a. 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/QZW9K2471427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a88412f4312cf67e2855d8a8d787696efafbed0406b77dbbe51c2ccc876197. 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/BC3PG2403545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e4da0db89186c4e5376b1a04b9f8f7babd37a314ec52bca60d32a8a07aeae5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BC3PG2403549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bf8ff7dc4d211eebb3209b656ab82427e25565cf78840b0c7a5076acf1d509. 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/BC3PG2402741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7ee5ec86d3efb0889eb3ba12c9f1273bf4a82729782246ca7097a181233d48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJZ2470109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94e53ae4a75ff831b0c3c6295aed06a9e35417d20f0a2b76e14434b7f74af6f. 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/QZNJZ2465332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb043a253dee0e6d371f536d07ed63b5b14d19b3e601943100a39a9a8a280e5fe. 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/QZMZ92494073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f688fedc360aca86aad1543ab13aa521a10e13324f9bbf484560e92a19841. 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/QZNJV2497661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e61df49fb2dd415c99727fc8228743f5574ebdbb3a0f98057656e52e9fd429. 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/BK2242400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e603137eade82e5e93197de7c5eee014393b3d4dac67138a1872dc181334f6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BX4IU2409211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96bf4313f46e0989069ecfa0303b97eda3077d8c315d5606efdb9a055040506. 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/QZMZ92468164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bc84f873e84a10a4f7e1987d2c7f72d593f8b9bbd67a5d419faee22a0c2e64. 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/BX4IU2409651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b72697c07d6ed3a78a3a2d32b3ae251e7f5d0ad658b19b45edccb289859aa2. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZ5AB2401720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad9960e1d67b22626cf21394f302c86c5e5aa1ae027d2d4a047aff5b2c65b1d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BC9112400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20578922d90071de3e03c59865b575770c00853eb55e536bb27c171e98febeff. 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/BC9112400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34e2f56aa287c2c1bb64c613d89495781333a4dc13c7e0a7984a3e76d9495c8. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BC9112400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af9b623db9c6855c707880ae3451c6d331293e5efe94b491de67bab26b15d66. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BC3PG2305992.
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 0xd814251df85044b634f4108a02fda695df0b5ec94bc11297fc889a333a713fc1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BC9112400006.