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 0x9699b0dde6bfabf2cf1e0f151c8e8229555668f99c4b07bc37d27a63097d8011. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ac2c6af-566f-4196-ad63-511d7191217c.json and https://artists.proofprofile.net/proofs/artist/9ac2c6af-566f-4196-ad63-511d7191217c.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 0xad0b1cf92b671d0c009ac3801edc169daaedb10821425edc2f57ef73257b4b44. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:33Z), 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/NLHR52115349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8861effe40a9779d16d405a69039dd85e7fdd850b7a412d109c38f976af0294. 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/NLHR52116964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef8665bbd1cdd1452d49948bcf3e133aae8cd21aa2817c687f90e48d6578bf3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLHR52122046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe725a2cd27c9479e0b94211260decd053b736af10134e850bfb2290cc6ead92e. 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/INT922200076.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c974df9af1986b3d9a2b1e76cda3600ca801147241ba9a5292ddff6b6278f2. 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/NLHR52131955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a83d97b44ded7832e405857b61e607d38009bb3431d0e38b0b65a9da668c2f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:51:18Z), 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/DGA062295868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb03e9c203dde69faa77ebaf1eab5d429238d0114ad8d6c985412e4c10417b7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NLHR52134746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e3c564daaedbf0005f1aa140f2ccdae5cf5062220bb37e5146c51b866ef0d7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DGA092229123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b09291c629f63a152a37a34421e0c6ee04e1f01b2515ec51edb9b57137d463. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:38:52Z), 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/NLHR52152214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cbaead0a15a3cf40ed5bc92db90003f945fb2f0e8086063326d82b12910058. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLHR52153668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cebe8fe3266ef4246dd36bf57ab5e19d6fcd03165b275c9d4bb811d158c00b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:26:37Z), 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/NLHR52152213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50979fc2f5897cc4e1b548a03a05ecf73357dba4a2c67e8c95cc16dc235c0a1f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:38:08Z), 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/NLHR52152211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58711486ea7ff11ea60841f8946d51dfddc5bee804eccc218d8f55968b191399. 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/UK6822311259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e8d8c67377354e7ebc0abb53497b59a4d2b5fa35020e110b823e4c9d08870e. 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/INA6W2200411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c38a65b3de84273663ccd37ac90c42b57ab1fa2b2f8b959d1728d4957be36f. 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/ING212464250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4313bd16eeb2c634a8ad9284bef55cffedf02805b4c3438296e84862b5ab5c. 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/INA6W2202193.