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 0x0796e19d3e25f0793e5752d55b07196d92917305558c9e2f545ade873dd94a1f. 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/5e0f71b5-757b-402b-bfef-64ffadf14230.json and https://artists.proofprofile.net/proofs/artist/5e0f71b5-757b-402b-bfef-64ffadf14230.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 0x34273d254637b4478f711a53036530e35091265090d30859fe3fc05fb846a388. 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/QZTB52383078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c5c337fbd5d85fa6d9bc995fc5f7e68eabf128aa70aa43e51f880dd35111be. 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/QZTB52383080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e0d67f2796ab435d5fafdf8a5f8102c82be962a8fc42fa0cd625c21279bd6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB52383081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d1839a7894e548a23cbf611e3f5a58f43e1ab900f1a2ede50f085e41d8ecc5. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB52383082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3c013a811b8d61a3cbb1fba867b4d7eeebb4a36bab3156d6a4309663e5534a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZTB52383084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a92ea8ef33a6327567b8f68cdf22428f41e7cf21f068d63cbfbfe3b565f8159. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:54:16Z), 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/QZTB52383086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a8ee2f0a36a0a2e05215162297071febcff83d56743ccc6ccbe10101b389fd. 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/QZTB82364307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c16adc398b1d95d1d3b29084b90826932f5e46b99000ce89ecb5f162753e5eb. 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/QZTB82364308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17070eb166b9b492b986b09e54233c381ff0984e4aea3fc1d74d400fb742d221. 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/QZTB82364313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2204b51893deb85d1c14f2de80d5fc6b01595df45d46b8479146f7b6cbee14. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:38:15Z), 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/QZTAY2472952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a83052bd735f9c44e749744c0c2bae742bd0c1f714e99406fba5088637e1e7c. 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/QZTAY2472953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f524c8f45f45e99bf85cf827de3c8bd4965d6d5d71d1eeb9c0f63a652351d36. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZTAY2472954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e1de009ab4d488405c2ec548ddb4b40ffd921fdccef5ffdcff41ab1136a8a0. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTAY2472956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c01a7112a1477b0171d775c79b9be162c2147ceba603c9c164927d31e183ca. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTAY2472957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4a4b8dc9e67427c752b55232a254504a8b4a483b174ff0d670e0f8c4fde206. 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/QZTAY2472960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12f7078da79e695f08f6bd094f44e30e14e2293a3da9cc88896283548d6d536. 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/QZTAY2472961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752b448e7b5f536823449a35a821876d3bd0e31be8d45d94fc75d66c086e7a71. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAY2472962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1be54d99cdf2569d3b1bad71fe0de1ddf21661fea0dbb39ddd6f7eab7e4a169. 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/QZTAY2472965.