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 0xb2f96dc6e314736a2f25f550c854edb8b4f0ab4af0d8a7fbad744c72de0153c5. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dec3de8b-849c-4b19-abcd-11b734aa60e1.json and https://artists.proofprofile.net/proofs/artist/dec3de8b-849c-4b19-abcd-11b734aa60e1.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 0xecbf097071eca3e27575577fbe71e03aca4c7d90a606ae0bf00b1ad83784b41b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/US33R2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143bde657b2932ff7571a146be7e5c976d95c2ce27d9c31feb738baee27da9e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US33R2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf954928c43fcc230bb26762212ae813ddaa23602648e88b66834c8bc468921d6. 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/US33R2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d37225d5fa4352165e632b55a4b67a410035fff4f1a94b970effe271da7ac2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US33R2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285f530073a655bdbaa69ad937a014924c26265fff4b26e66eec761f899c61f7. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/US33R2200012.
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 0x93dfd3268f1e581e0750329a7417e718b49dd60f7b616d3f995ed663f839bbc6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US33R2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2cd93c8f597e777ca44e160a4429157cc6d14d89324839eabe6c86967a2739. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US33R2000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2386f2bb7cb182b8065cdc7f0b78927a4e77a65ab142fc17c0b5ca791da5ddab. 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/US33R2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf720093b308ca76aeacd989be2484643b02bb3bfd93509dec34498beae124348. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US33R2000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd918f39f4b2b21054f5256c6b67a79c984af5965dcd3109d6002501ec83262d3. 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/QM6N21826554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982949650b41990c943efca27ac8a18f34147e647631220f0600be168f962830. 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/QM6N21826555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6978ed00ab370e46e7a05da95f388b18d73cb0f237f3590733c6f8876205362f. 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/QM6N21826556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff264eba52763064eee3c9fbd0d6b125049f294d1bc258c436b4f7d3abec9c15. 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/QM6N21826557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b17edf548ff14865bb0b564a40a993eeee4de2f03e25f038f0dbb4953306e38. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QM6N21826558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1623e095384c5b3f472a3ea5d8b41df346e3ac6c90672a845c5ece017c9569. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM6N21826559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0171d76d2f5a8ffc30293dfb77be4295f99e18fe8b44c94aa6d39554682d7a15. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ91743170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd3c9ba88af2f39bd99fc59d924bb37b822e928cf9ff4bd73d0bf3f943bbc32. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:58:05Z), 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/QMBZ91743168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d30a53991ba799831d46e0cb655cc61aa562b6752d8e4982b12fa9fe5a73e96. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QMBZ91743169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7119eb850ccde8ca0d152eaef987745395a8b2bc9d05a32b969622cc532c1f. 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/QMBZ91743171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6053575398c3f68b593202042eab4149e0ef2417806564348ba66a2ad12367d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM4TX1746063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0512aa0f6036be5eb6b7fdf18895d5b9f0b3a635c1d5f7894fa3c40b85b227. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX1746064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1490e4b1c57427fc6e59f874d812373a183759d97524739328b12af65f9c73f. 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/QM4TX1746065.