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 0x1f4d975bcd4b8d3b6e1a0bb8c208b843beb970860dd54d257804edac9eec583c. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/491a1848-fdf0-44a4-bdc3-8eb6837926cd.json and https://artists.proofprofile.net/proofs/artist/491a1848-fdf0-44a4-bdc3-8eb6837926cd.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 0xff2b0fc4f0445c3f479bf564024f27840ec1629cd3b1fb27bb9befa4cd5cccdf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX281977319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7427c70d1c6cb01b7db32b98c4849b1324db458c59f1ee1baa91bb6273a1a30c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/HKG731775776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc125412148de239113d0666b35d24f57077ac9a869ab19735ef665f4cb897b3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:21:09Z), 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/HKG731781720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f056c087811a9f8c80a9e5247932c950c2e74bf30c9d6471eabbc66e2d2f1d9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:22:16Z), 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/CNC072300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8282fdccb6ed6cf9f2bdc644cb3db198a8c0695fba133fe592e2a514b2449602. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:30:24Z), 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/HKD012315052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2893f51ccffd605044eecb8596ac84bde2d9222676cd605a9132972d3bb519a2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HKC992725772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b39b7ed083664ef12a35313258cf98c3d7afe08036fa579b4a334c013dcea4. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/HKC993024737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac96b8efa99580c10271a6f5ac1e687f3c2c818e39fd9b7fb569ac92efe6d0d5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HKG732546130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7c9fe82e398572edde3af90959707d8eef7e0dc94712d33970057927bc8a0e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HKE672501043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13c8b9c507030ee602b53ae367687510821d136a1d6b028694aab6f4d187312. 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/HKG732105732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf42638539bcefb20a6e9ee0939b4f90130d403dbf852f24a106d66bf667dd6. 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/HKG732105033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985eb61971ed643bf60d26c02c4eee10014cbc622c58bd3b0f6eec7bb0b473b8. 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/HKG732105026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965203f973b3f80834d10ea948e9ed63b0ae2f81a54c55edc81e300936650245. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKG732102506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c398986498899bada920a0739db182b8ec54e411920dd7e8522853b25d55780. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/HKG732103126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7713a49293f877b272dc327b58bfa49793515181f2a4e4e14dc0b8d0cd124837. 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/HKG732105714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b9e313a77bab2ebda9192795e06cce47876c9657f125c4ee8b9432df9763a4. 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/HKG732102992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f8020fc7370a878b2f637aa8b1defd9b9ecfb690384a5c34017a8993e220ed. 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/HKG732102993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d55dfb3ce83ccaf02724615fa0eeb5bfa0b4eb1fb66dd0832c7a6fd3a0b62b. 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/HKG732102994.
Chuang to－gather，go！ - Instrumental with Background Vocals
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfa9d65caab5652ddd4bfd7a31561b668c89bfe02dabd67c188ca959fc039f7. 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/HKG732102995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12ebb6f42aa7b03aaa4d61336c6ef7291483045b2b19b990c95719e121b5b26. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:26:09Z), 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/HKG732102846.
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 0xb55c83c6452e866614dc8ca58f3354aa587dd3768e22fd0225da2dd43655587e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKG732102476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa137faa41e2ae6119dbf9628518659adfc0ce68b52a0fc268409c64bb501c478. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/HKG732102840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755a4645c1cafdb520b0df9a34d13b2109a03d2eb992d86a3d13645d116b7be1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CNUM72500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ba9b1d7a7063205cbed6719b172144e87c4dd73b3d02e06c1fa50590a1f72d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CNUM72500050.