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 0xb6ccb5bb6ea5806628936bac16f01cfa8d869ca92f07f5ce1fa42c9aabd81810. 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/809d3660-7d03-484c-ab38-d90076a6b719.json and https://artists.proofprofile.net/proofs/artist/809d3660-7d03-484c-ab38-d90076a6b719.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 0xfd46e400fa43fa589b8aff9338820f2cabe5563872606c8392f641fe60bc5149. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GB8KE2319503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8677642ce313a3f4aeceb3c2854ff8b77634e61a5e222673792fd5a8a0743d50. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GB8KE2401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30229028acea0d1c212b4a5a0e8d1f1d3a106a16b394036f82ef2edb5b2684d9. 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/GB8KE2421825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5b513a193cf4fc88057b6a1302ad6cca5dd9d217f40332ebee25a1b34f9698. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GB8KE2328878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8677642ce313a3f4aeceb3c2854ff8b77634e61a5e222673792fd5a8a0743d50. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:08:31Z), 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/GB8KE2401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d81e24d179c2581d4e952714a1ba3ebf96554be972d506655f1e8922a4de48d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GB8KE2427763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a34bda1308dfc2cd4496f0ba4ca61fe20e7853a905b5c43df832a31bfe9d51. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GB8KE2503707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67929f225a66bda64a4b6ff963ebac6afe1feb06fe6d2dfe3622384f331ff83. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GB8KE2506224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c0165de874f99821f9350f5d9919077406e1a9dcf6096c370cac4c0294ffe6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GB8KE2508747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabd1f211feab0af0201dfeeaab7dc4b23d57502e5ae2813f16cdf1a377c92eb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GB8KE2510901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ca2538c716882117ffc4394a29ec4f6114810b2c8582f322e0934cea8776d. 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/GB8KE2518979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04adc794d7d7e02cc846429d21179cb929b857e83cec3af5be11d62e9545172e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GB8KE2417857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a34bda1308dfc2cd4496f0ba4ca61fe20e7853a905b5c43df832a31bfe9d51. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GB8KE2503707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ca2538c716882117ffc4394a29ec4f6114810b2c8582f322e0934cea8776d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GB8KE2518979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabd1f211feab0af0201dfeeaab7dc4b23d57502e5ae2813f16cdf1a377c92eb. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:09Z), 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/GB8KE2510901.