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 0x1d664d6cfa3bc4d4b29731d681995dc55595c47d5d0c57631da2d5b2cacb9fc1. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b27240d-9e58-48dd-920d-d8edf1f14d55.json and https://artists.proofprofile.net/proofs/artist/1b27240d-9e58-48dd-920d-d8edf1f14d55.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 0x4cfd5ffd193ede5f393aefa2960109aac9fe3a3a0d714a62f28edd0fdb5ea9dd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB82418097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c0654a1e34b40b89acd93d77e7b3a23781f02d3265a52102a67dd1ec9b20fc. 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/QZTBC2404151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435223e8bd7f041fe5b835e152dbe061c7c47d82377d4d6677f538de1864b8ae. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTBC2405011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa46da8eddfd6263dd691769e1b1de9c5539df936ff6dfe8faa94891c61616c0. 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/QZWFV2406743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896689b84496cc87a78a7fe51f8d3bf95cab21b13c45aa8d4f631a8a96b43c57. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFV2454466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ea2f7a188ec8dd14b4059838789f88554ee78494425807075e18660d8ea6b7. 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/QZWFV2451521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d734f5442451d4f3fcbaf15429919435e4b263682a078469c9004d5ac6fc26. 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/QZWFV2453358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a485c8d2901737c2e12a4aaf077e9cbeb3db7a35a8ebbac327c4b8ba94975a. 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/QZWFV2462410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336024f5655cf2dee6bb3dbe15d34aad3e17914731ed69e8dc796d0ccbb45999. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZWFV2454465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292de36994e21e8058c6426607fd9a7de2cca7170179e1fc0b7a5922cb241c69. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:06Z), 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/QZWFV2455647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c2554dcba2b26c2f3d4c6e08a162374d41298191b11662a9caa8b8daf514a9. 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/QZZ792454820.