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 0x61874b1ae2ec6033ed4c881634338919a94124dc1e545c7c001d351c09a0a818. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbf21dad-dcea-404c-9318-2ce7a4dabec1.json and https://artists.proofprofile.net/proofs/artist/cbf21dad-dcea-404c-9318-2ce7a4dabec1.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 0x03539922abb26a5fb4ad9fad7ad667da1a7acba406b30adb272e6b813fa9f35e. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:40Z), 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/QZBG31800003.
Oh Little Town of Bethlehem / Oh Holy Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe64e036fce45f7a09fe2eb5484993bfe80d298b20c6a2b5727c3356cf35dab. 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/QZBG31900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716d27ea12d5c7ce3dbcb2c0ddedd89441ec446bfeaffa277450d5d3d2eadfab. 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/QZBG32000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0ca6e74a7b35ee2aaeb2dda72ef42ec2de4df01868a037fb328495d1d872f8. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZBG32100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5898e26359c8bca7359274f013465309a445b3016bb05d9132de43f6d6b5fc1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZBG32100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd726c681e4a3e86ffd7d62d44b58dc4e501c1fdfaa2c879a8aefd51b6594dd2. 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/QZBG32100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4f05d110a2eea80ce8d873f39c6c5c9e0919822481736cd8277d38122251f7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZBG32100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b99378ab3fcbfa981e82ed9c6eeed73727637b2c84e8fc4dc99fcf6e3be29c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZBG31900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1dbe740d2990469ab36a7281bfd11c1755a2b6a72eed1257bbd753330db16d. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZBG32200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd78f1c5c239876ba36ab13317f18d010be11414ec27e388d7d13b9dadf08683. 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/QZBG32200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae40d0fb0c65f015d40d67e2b949674a90867ac2da617c7ccd027c57e591834b. 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/QZBG32200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9116f8d91dbe5c43e22fd4582e2f12220bf7ab01230f91ab012d0df4c7c9a212. 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/QZBG32200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e66ce0029a780e951e93f486352a331df44154e4f68c3e2e839a60270ccebd. 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/NLAM42300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce309aacdbbf113b9441397f64d89d1ecab680a01fe63fa729813b9578491da. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:46Z), 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/QZBG32400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6834ca1edac99821e49c91933f1d05212e82acd9bcf5e1fe73b24cf8d0361ebf. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZK6J2483398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffa2710ce0812e6ddcc32f3a3aebbb243f5add39933543d28bde0a52e3b6b9a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZBG32400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088043d2150c0b1ceb841e5d2d8c6ffc4a8a085a4111ca6e2eddb79dafa6eae5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/AU3SE2301475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e0c1661f94319f9e148a1ab480c063a9507e92284772bdb8a71b66a96f90a5. 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/QZS642208172.