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 0x9ee817994e89c40f49061ebd19c4bd1aec559324fae34f20e12ef5720910b946. 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/0d7a1a5e-d8f6-43a4-ab41-d0d202611983.json and https://artists.proofprofile.net/proofs/artist/0d7a1a5e-d8f6-43a4-ab41-d0d202611983.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 0xcc2405b3436541f5754467c87c9b0571a06ea4d645d2acc8948ad7a048483406. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEAR42241970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb13653b50eb7886eaaa5250b6536152b85670e38bb73fd6a9ff4db21e67649e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEAR42254150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61b46993ce71666c41d2a7438831192c64bdc785410f2b53ca7d8467faa3002. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEAR42236427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ab49333494fe48e764433b0e704828517af1466e6c4ef05e325f3ad6ec3bd1. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEAR42232341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd0de8108da6c346cb8b4547b2c976ec36444bcfcfb3564e263a1653076babb. 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/DEAR42284792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8956e700eb466d9829fa52b5467a06916c04cdcca7331c4181c4e3cf562e7. 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/DEAR42285363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c99aa500c001a7321e895465cdf9dea39743442a97a98175012cf21fceda05. 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/DEAR42328183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82754ef56794bf613c05f22809a1c16148ba66fd61e2aff2001945a2f48352b. 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/DEAR42354572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff28919c7d8c7a03364dc94a1d109016b4671fa9a8a1b8a12f0bd30f7da66041. 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/DEAR42370099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cb93cca3c604a60ec50eb4f6b46cf89c92365fb3129a45859adb08e0ffb574. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEAR42464551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff8d9436190e0155c5d749bbcd4ef7f67cd63269b4d9b7690529cbe8a06bc3c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEAR42426879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b41db5660adcaea574a5cda0dea5640899bc5a10c9605c6792cb24e6355d1f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEAR42422405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb202e11726da688e2be3ed81d24af35060a8c24a0852ec0eb918cde202b7e5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DE1JN2445445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a381c0455089e11348b3bbbb78e3ac308606cb2106a6b991d10f0c6405c6133. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DE1O62491330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120acdd3f9261a76ce71a7046876ad2696cd56f88c51220844041c52f9060cd1. 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/QZES72563611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120acdd3f9261a76ce71a7046876ad2696cd56f88c51220844041c52f9060cd1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES72563611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7205e3ba34905305a74efc55e28d144c30aadffdd92d38719ce77c05f6f9ff7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAQTR2501915.