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 0x6771fbe10003db92317af3092a7c38868c4b6f92bbd897e38e179b57b0e2625d. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcb1b9aa-3b36-4caf-8003-273d46a2e1bc.json and https://artists.proofprofile.net/proofs/artist/bcb1b9aa-3b36-4caf-8003-273d46a2e1bc.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 0x00d0211de63053f0c6089a751953b81963c6b7afcaf30d975fcc87f503a5600a. 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/AEA2Z2545483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04b998078b9e83f0fdfa44d0ef8b14ba17076cd1a6dbcc33ed8ce516f2ad76b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/AEA2Z2545484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0557c578add491a848642107faeec9bd4f74e5920bfc61108100feb011acce07. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/AEA2Z2545485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d153f8f84bb640796a16985013aa3ac4b209df21f95444fe75edd1f66ebd86. 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/AEA2Z2545486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19c0232aa686bad0d60bed2ece71fe33f5ac578c3defe43eba6e16947f9b989. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/AEA2Z2545487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b092b1af67c541c65dbdae0eff39a4c26d0c84a04530e462c5da0d47ccaf83e. 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/AEA2Z2545488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47697ccb93438df7f2051530a6c50fdc973a2b092d231c22422a3c732b949c9. 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/AEA2Z2545489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb2d37bc4610f0f5657e83e69ae637ebb26c6747c8813fb8ac721ed0ebdd0bb. 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/AEA2Z2545490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7f3a17b80d6f45154de44ba62d9ed9f5a98befd4dfc397ee4d858928025be2. 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/AEA2Z2545491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a75cbc110f5e49464f73861fc7c0cec18915aaa62aff93a89795cc0f39fd266. 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/AEA2Z2545492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a50531d7aa8d2d62e9cfd1ccc1f87f4ed299b6cf6ccd45cfaad707a9e9384bb. 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/AEA2Z2545493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc6cefce35b39357fce4783f7099e594384a4b9a7d568061c2efd817a1322d9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:44Z), 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/AEA2Z2545494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c93aeba667396349a92d9a78ed570391b601c2f760d03a270d3a96fa5c5d242. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/AEA2Z2545495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe8bc5dca2af19f9bfd12e44c0b1be00f6d55041c2ea34995e6ea9e0f076a34. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/AEA2Z2545496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b27679bb72f177b92353d592ad5938883e1e0a4a2395b986fae94b8e0c80c12. 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/AEA2Z2545497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3229318ca86e37d73da2a0aac8cce6946692e9a695e843d5e3b4c1e499fbb959. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AEA2Z2545498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0223be7ed3ac6ad4b525cba8466363d66dd20edc380a5c449b88981615b93a. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:49:45Z), 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/AEA2Z2545499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e89d443fe260244b42d159e33be199a5e4125da8f317b41a34b2f8a7fb8dde1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AEA2Z2545500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62af077dcb8ebc0f2ac6d5c422fd7a5588f9750b65917ee742734b8336de09e. 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/AEA2Z2545501.