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 0x44baa28dd309e3e20822632d783ea514c0a09c238ab620fd918a9179b16ba873. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce285b38-6b42-4922-a3a5-99621c4b9139.json and https://artists.proofprofile.net/proofs/artist/ce285b38-6b42-4922-a3a5-99621c4b9139.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 0x00562e797523653fe123f86b0c41add204ce7ed22eb5ca018343fcbf4c8d6361. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBPS81554325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99fa08548060d0581493ff558d49d624f142469df29f15a343d5c8dc438d36b. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GBPS81554332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cadc2736a0b18fe4a5d80343ca4040db02c3de2ef68c7ac1edbbfa8c012989. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GBPS81554348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd1f5a956a08966e80135870a545403ad1f8b7fcc9751712b3639c968f9fdc7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBPS81554352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59d857119ae748d961f84bc83775df0a04f64956899253bae4feca84c47c92c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GBPS81556039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faf9afb770e1e4ed112f75c25dd646b1ddc4794e8949867b6c1854c09c6b012. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBPS81556047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feb3f99090eaaafc97f1f6edc27a3eb6977da7077e5217eed77b69652f0a14f. 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/GBPS81556054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1352cc8ce4153c8d611872118828f9532bb47ebc36a7ae6cd5353f38c15302a2. 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/GBPS81556056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094948e1d583dcc9ad9c81654f2fa1d7333c4289414b732d9aebc851d59b7587. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:41:46Z), 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/GBPS81556423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667aa7758e293d8c1fc03f3bd84abe4a38939ea03353175f66e04823e82c4b5a. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GBPS81556432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb306eb2acbf518fc4af11c219faf9fb590f618abcb475ed093f6a107af550de6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBPS81556433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1048a0989b22f347dc18bed7aa36a637850778001859ab33ab8461d32e409ba. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:56:38Z), 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/GBPS81556434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1b8b85c1e55ea69267c09c89ba0b2cda633675f3c45ced29952456acdbca29. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBPS81556435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed0a123fab4a1783631b72a84ac5f41bed69fcd08fd606aed3f753b9d5fdd0b. 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/GBPS81556438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7ae8b31109199af23e190f130a9051c2e0dc8906dcb49274394250e02be275. 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/GBPS81556439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcd0ada3abfdd72072a6b106823f7ca173e0fad5a5dfde9842dfe40180469ea. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:22:32Z), 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/GBPS81556440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1db752e7d98d3fcaa977026249460eea86231cdaa16ae883e015c1d608facb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:39:47Z), 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/GBPS81556445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441589d97613905b07a3be2d0c8bdd7b5db96ad4646fcd67bd6f18a424deac0b. 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/GBPS81556450.