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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9928d6c863c4ffec16d225959a5bc2eb5771d48b99567b271d22c63bf040ea1b. Chain 2 (Bitcoin): anchored in block 953939 (2026-06-16T11:40:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/204a182b-ff69-483d-85b6-2e2c1f75b9ea.json and https://artists.proofprofile.net/proofs/artist/204a182b-ff69-483d-85b6-2e2c1f75b9ea.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33b491d03a6aaa9df0a060cb58fdfd7f2f0907b6c1bcf8df62a1a0aa2d54b2d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM42K2292951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753d229bca7a4b3cde07b712288ddcc1c124caca59be60d051c7d32617acfbb7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZKDK2278535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ab5ed11df84181d3c5e92d72ffd78874e14de5364e51826be61ee55c07fad6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QM42K2265935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2077873c5e441a4322c9c60babbc8f579c1cef5b3f09e6c64c8f8e5a75c8e7f4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZKDK2255663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb273e51444f0dd27bdc7a18ac24ad6b16996da89d6a54d22ce4862f1a2751080. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS652170326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0398ab962853258da02969e9047b1d451b6aed1d8c15dff7742a24d51c4ea0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS652151864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e63e36ddd755d64784be32d6a6987561d07f7eb90fbc702b2beb3e3fd1ebc36. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS672181941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccff54e95841802fd8eaa1f8af496d344d985f38d3cd825a3428aadd8b633bf. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZS652250232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfe6a891b35692307ec88cc6079e2638372f8d68df8e6de15154538af0fc5a2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZS662295183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b76f74f40b094c2dd053790a057850f2a393a9370d19b4e255249fe33568bee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS642102080.
Sorry Mr.Trololo but i broken your music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1858ecc4f1e6c42e93f3d59863efabd804f3174980d1f92f14d6d33daf73a6c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZS632198269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f9ea29e5c411d05b96a10d03099846c8ac7b57559013a4838647593b8e105e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZMHM2088842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557efa9f5d0e8dc81f7b60da5302e34ef77b3e59b25af5ad3c49c0c47e84da70. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZKDK2166095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbb4dc5f733992baaaac407db5b1cdd529ae03d23e4557f9d38c09a4e8bb156. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZKDK2120006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ca2d79e8baf12f26bbfb7dda51e8024d69f82c8944bccd4b1e686dd785c684. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMHK2360241.