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 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 0xe335a75c1f65e648d2d2f35be05b55253f103fc0910445227655a5cf38e3e0ce. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e26504ae-07d7-4bca-a7ea-66651e408cf1.json and https://artists.proofprofile.net/proofs/artist/e26504ae-07d7-4bca-a7ea-66651e408cf1.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 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 0x62cf79ba283e91d48725dd64c88868dff21f4f144996c50522a8bf32982a09f2. 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/DET391326301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a2501de91c212668016ccb4590e2b96ca433d084c25d04fee9aaa49ec64cc3. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DET391326307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fa7444315b4d2d9d9deeeada2a8a30ff6435a916e7128baaa91571381a970e. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DET391326310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77e83766285f40ca6af2068b09c6a204225759ca319f4fd063e6f8dac82d6a0. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/DET390924101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521e6d3a8df9fc9ef3faccad10f2af2674f8bb80c190d23df567d796e5cdca4e. 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/DET390924102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df0bd11507b70d0ca7ff52158058f33f3b09e122564515f7d84c23f43d84d8b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DET390924103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56b068a4cb201d7dc58da2c62cb5373b62df277fc2a538af7d9d0cbc6fdc73b. 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/DET390924104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9d55f3347c486e7a20f2cd0df4c83df919009aab286814291f95b8357f481f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DET390924105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d47f4353725915bab3619d3657bcbf2c5f60621eca713196b162872f188c71e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DET390924106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362dac3f311d39eb9f7fec67a3bfeba6f89121519cba456520c966198fb61ecd. 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/DET390924107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0290112986a37eb3a96f098e3c489fe0815a1c8c4008f96a867e09000d33bd4. 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/DET390924108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b476f9e009f1b43c81a4e6d987d4d17d7629aa29659d93b89fe26ef5d73327. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DET390924109.
One Hand Clapping - Club Des Belugas Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3d2f7523f049440055a2cd5f7f846cc9207c142752ac3d98199388689e15ee. 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/DET390924110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caf245ac73caaf1f6d07d6f8f2680e468c943b2021ff93266aef6a8345bc107. 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/DET390924111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aa568ced77174863c6e41040f942009b835e95c89c282c547cb35d19dec154. 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/DET390723401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07415f65d72e0f7d5a3346b92b91743eaec590a60a85db8f93b5a47c1176ef5a. 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/DET390723402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1721a19058bad1b0792cd56b91155e007f1c9e822cb6fcd6aa6bc18a0a7fc81f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DET390723404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc68f7708b7f2a37cf5b3880622f7de8b9579e2d83cdf0aa7154d13bd390492. 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/DET390723407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b586ef9130542f31d5a941086309e1ad555a5fd8b417a6b68d07af23e8870d. 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/DET390723411.