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 0x6c94adc3de13563f88a5d3760e5a8cb80d3c7d2de62cc68eeb6eedeca2d394da. 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/cadad794-91db-452c-ba0b-691a1f2a39f6.json and https://artists.proofprofile.net/proofs/artist/cadad794-91db-452c-ba0b-691a1f2a39f6.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 0xa7fbd7371436583b234e2ec246dc49537a6c2a332cc467ede1a16b89f24fe306. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5W32406018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2445891d9b70cde8bed84c5553847fa61e8ae079dffcd89730f6cae77a0bd62. 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/SE5W32405802.
Is This Seat Taken? (Stories from the Hotel Bar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebfc309ce193a38b7946d66bd2ea4929170fe7944b66c70ed1e580080e60cde. 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/SE5W32405221.
Not a Worry in the Sky (The Weather Channel)
Le Romantique Sans Espoir (The Hopeless Romantic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127c662a4b42ada1bb17a641d2183d0b5ee80f292e69d2dd976fd596064012e1. 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/SE5W32307955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438b76609af4b223d9fd6df5fd782a0f0e91682a6a4959ee484126863a1c9e37. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5W32307503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c7798cbcb427e4ed123ba44e9953c0770a4f3426e235c9184b387d3fb6b0fb. 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/SE5W32306972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8c29963f81638d211c31ca2172fc31df44b23e49719ef2775ffe39b84777ea. 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/SE5W32306500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981142fd77b6d97a72a15ef6e8ec896bb84c6cd616907a75180014da65b5b071. 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/SE5W32305862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dcec83fe9d5b00be286b7daf367a5668cfb853aa97b8f234d51c738aee2288. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5W32300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866f2060816b519fcff731708e3571c9e99f70697e609834286e0966ced8db90. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5W32293861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c3ee6263205b51778962a8467d78f68b8892cde3a1aef557d08185b3eb0dea. 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/SE5W32202750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797b962966ed59eed028119f4c2addb285f1f1ffc0cf37a2a3caa54d3cfba566. 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/SE5W32202346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba7b151f0da32f3433a976dc770408b0b264163dcc777c3ec81e7e4c4f99545. 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/SE5W32201203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dedc3ca9d6b28c37ed24b08ef4fa86563a4d9e938b8edfb92ee412167ce70e9. 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/SE5W32200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7c0861dc2b9e4145529a6fa781ac0c75dc2305498ab24d66e269679028b4b2. 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/SE5W32104021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a5c4467f15815e27dbd057f543e38d4e7d88b202983a872868476611b5a3ef. 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/SE5W32102361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4b5d6e0d98e9fe06c71c0bbb2c0fc7c5079402b1ca8f814456f7b2cc49c4a5. 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/SE5W32102215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdbea050625d5ed280d553cf4315194062ffe92d6120fa8071841be46c25d44. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5W32100764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763d8c513a575d01d8b2371b896b2906fd41c48db67c205d35746ae0f73ea60c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/SE5W32100765.
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 0x0d53018dadbe2e05dd0cfea118ba267d6c65735d1a0e1edc4ffc95bb4c61a07a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SE5W32100766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffae9e1eae60febb48594dc96dd0f9d7c13261436231b731ac80a177e1ba22a2. 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/SE5W32100574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaf1a43d141cfe61c14f330e78823af8464a71fedd76ddc2afd48f0e027edea. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/SE5W32100573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c59b67d4480563708d09c07d57d0d17d087d15d5edf07fdff900c79d179772. 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/SE5W32100575.