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 0x58955f06102ee0314ac276ea2a905c66fc1ea1135c81a6e26fd0b9731e38f0ee. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e732c306-b145-482f-97b5-9bc1c11e6aac.json and https://artists.proofprofile.net/proofs/artist/e732c306-b145-482f-97b5-9bc1c11e6aac.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 0xebedaad3c00a8821222e65174fc0d6618b618522fc549b6f7137a9266dc867b8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZPLR2472724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d98366fc1fa91193083c6eca5061481b88e88c129a7ef81acd62602c7248bec. 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/QZK6J2417003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952cc1ca375fdbb261a3a61997293d15d85eb64ec2710e77176abe047cc95ed8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ42451228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced60057289cde5dcdbf5f4a6869ecc00b193e42ca8a7511cf39ac8513db4371. 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/QZFZ62471997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820a6a42e099f26c13ffbc08f5f2f92ba730361827973e011059426cd4e7e97b. 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/QZWFE2359471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83639fdec098c134dafddc977409b402cde6ba323dc75349ef2c064ccac1a924. 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/QZTB92300229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b65d7f24345fca5465fc1a85f0072d3536bd466c096cd7d9a0ed4631010ee1. 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/QZTAT2353896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb765abaef4b646b7350342f3758e314714cc473fb5ebfb04b763dc1398610c. 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/QZK6F2269053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1daf2ac087d1a4ae2674ce46f45036c2364115d5a0867baacf8b61620b7886. 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/QZHN82218022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d545f0db67fb2828eb1fbf1ded319c2050c8a348a2073ff7ababdb5d4dffb19. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZDA62267693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde24647f3dac357b99c6cb507b9dfeb3db4ce4eba69084e2a95e953199752324. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZDA82233277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8d757fa53161d017ac77aa2121f4a8e0748af62a4e6c4bb53af6137619e759. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWW2115968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46b873470531ec9a72040c2633cb44fa9b9a6533d0fec641c0ad0ad6c8a8ac6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZFYY2054194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc971f61b7716e2508188d81f107bf5692de4d21cd4c3e562aca5d47e6078bf34. 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/QZHN81930551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9789961e179fd5f6ff9efc355edc4c6e27cc3c37613dea318bfe7c1c6259d595. 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/QZK6P2401686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59b3ce11397d3a0543da99005796320045357dddc1a60c533a608c311959a94. 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/QZMEM2285492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c5cd3c9ed734e56d6224dce0c8590b492eced13c9a52675b5b6c4068e9a914. 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/QZDA52502749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3035ae170b6225603c4f426e65428630e229f23621b16865638f53fed71c739b. 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/QZZ7V2470155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb998d3da987e8815ab0af532eab5388a9b362833628bb4ffafdee5b04da6e262. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB52481502.