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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 0x0a45193125426cceb9517028127188b7a68ada21ef32ecf40120ccb272392fa0. 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/85118b4a-f9b3-49df-a60d-bf2589872d4c.json and https://artists.proofprofile.net/proofs/artist/85118b4a-f9b3-49df-a60d-bf2589872d4c.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 0x29a2ed4ceb2e6428349bfcb350c1aa269e5a90561cd2abe7e69bb55ff4617c2f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:00:36Z), 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/USJ3V2078774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaef609f142bfdb4570b2673bc4b5c4ed662e3803b42c449e93a0bc52effba24. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:03:50Z), 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/USJ3V2078776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856a21f2e0ef8c345661ae42ae4fd696328ab307aa2b37d0b4823a3e20e0083a. 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/USJ3V2078777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6288bfc80f8dfd988feed0ca9f41c0de287be689c6a9e8348df4f6a49352e54. 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/USJ3V2078778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc10001b15ada6fef34cbe586245ec301c420635cf21ca0e07059ce4fe9b094. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USJ3V2078781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66549b065f3e762e2a6ebc0cdb4de32387da55c3da57081502b1c39c045aa13. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USJ3V2078782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64a3731f5943f2a6d36a42a61b61bd543e772228e29de92e2c67e1d8b4a58d9. 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/USJ3V2078783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b2190d7877e0c73a782afe5cef6e1db9f061fd42e310ae1d46f2da7e112bca. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USJ3V2078784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108faebc61396824f1937c07b1fdc049b1114c5317ca753738adb95377105bcd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USJ3V2111744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a9fe7329b8ccf126b716101c6d7a6f12630eccd1228e636d213c9306f70702. 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/USJ3V2111745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4812d8912d08ad597321e8368ec69e14488005da68462a8943e4bd5fb23375. 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/USJ3V2111747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3c8cf6d1d2785ae91f371cf1628a135e95276a4b7e23f1f4d106a7be08a557. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USJ3V2111748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202ef2e43dfd72187a11da424ee07f94457c0f48c8289c668dc2d6a7d6c71a47. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USJ3V2111749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81addc4ea4268b3360a13e26d227f770593723b9a8ac6ff1bd60552dd1ced44f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USJ3V2111750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a53964f83ded666365318b00002108107ccce35978c708d8997bf0353afa89. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:34:05Z), 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/USJ3V2111752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9361309406584f2ae756aa10e03539bdb736f42cb252fb3f018e79d7b5f44edf. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:07:25Z), 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/USJ3V2111753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e5e09883146980a33af8928f8753055ad2ca356cec0949ca49425df354f5b1. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USJ3V2145515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7812fa7d3ff542b38c8a27cc75225788a178a3db93037b66833ec3f05f1b8c4b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USJ3V2311377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894804eb34a36f98fb6e155273f2f77bc3fa2efc85cf5952e8f2f3cff594947e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:35:56Z), 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/USJ3V2311378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc9138d4fcc39a1b84fb83abf41f17f9c68e73b4bf2b92b7ca04d3237d57438. 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/USJ3V2311379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7006648cba044096a7ff097b054c6d205db9f8c831d668f3138c24c9aecf9205. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USJ3V2311380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe579945f48cc1f7c547af0a68b6678c780bba4491e1b180e86904ef5aadfaedd. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:44:00Z), 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/USJ3V2311382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa5a13cf144262b99a9664a97a311544cd43d5282b69f005a9da50ebd1e7c8c. 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/USJ3V2311386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa611598fa9320033e8079bb1145d909f223be82ac9fc5187f899b13c580e6f48. 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/ZBP3R2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94892c11cb6615a46473b0c5f38bc63c1175ae53fc14502acd451f2cf37187c5. 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/ZBP3R2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e425e973055aa6ac7918f8854a3c5d172948af74df8e3d033f74a161fd8480. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ZBP3R2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154d9b863ba35227bd3a410df5fd163e479d5871438ab9f47247c06ed3b6b2aa. 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/ZBP3R2400004.