thumb|right|240px|Soetkin Collier (left), Yves Barbieux, Veronica Codesal Urban Trad is a Belgian folk music group, consisting of both Flemish and French speaking people and a close connection with Ga
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 0x4633f099f4c61c3862730b58d307679afb2b8e3b90a697d5bf0b34eb4038acfe. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfcb62fb-2d04-47a0-8b98-2712091a2b9b.json and https://artists.proofprofile.net/proofs/artist/bfcb62fb-2d04-47a0-8b98-2712091a2b9b.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 0xd122dcf70fff58be044fa855744a7922adae9dcfa71845b907c2e054196f072e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BEQ010000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a6638dc4c534c3c7ed5534a6fb195ca08519c0643207b8def79ee17cf52540. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/BEQ010200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2678cace8fa5be66febb79042fa64309a5ce07ee8bc51db084dbd0b20ae6965. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BEQ010300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb553c7e51e2cc8a74f8bab754a3506f49001136dc9ff091f22d1b20616d525ed. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/BEQ010300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccced12ded7410553736b96d58f92d8ea2c7b74c7c6846a80fbcfbd53765a3bb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BEQ010300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923a6ac806ef9c128757a7b8761f1e9fdb2e0306c21cd0355f8ea01681f09157. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BEQ010300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb03b253c48e3458914cdb187d4302c44411cb944d10fd6aec781c40c12a4c1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BEUM70700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67e50ab449c2ea5f3034af1bd46789cf77f720818e4b1192cf7fc9006f86739. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BEUM70700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be97301d76c22753f50d88b3cd6ce18b1dd6e8fc3072aaa2950f3dc372c4e74. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BEUM70700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8034c31bedcd6159d0d481ef3ee1668d0404f3c4ffc536e06aabfb96cc440766. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BEUM70700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa1c67c9fd250ceb37dde37c17f97329934b78d5243f83092ebeef9d7dceec1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BEUM70700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f119a88fd93840bb218fb5ced8cd0b7277439630814e0efa5f4d76ca3a887a2. 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/BEUM70700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f47cc0a21b9824a04a70d5bcbfd0f626f961d9f9efe0ab5db81762abdb3fcc. 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/BEUM70700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f7bacdb311fd29070db04b40406b249d6b275bfa51f43c0acdaaad7a2c61f2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BEUM70700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25370d4826bc4019d6f6a6f06d2795cee439d2b946df33cb27bc5fb32c4f7ecb. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BEUM70700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe853d5f431d1436149e7cc1bc17584836ec281ff209b17e1a06638a118f5d435. 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/BEUM70700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804471040a2d5d0293dd66339a4eaaaf7b7ad7e61015200755ac5f4d54349975. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BEUM70700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96df6bf7e46477895e0fe3918a471984be48be0d7a063f13720a02aecf5d3548. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BEUM70600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34f8d8c3fcf43fed945365c92c25fd4cf7cd8a37071ed6536540ecc0fde226a. 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/BEQ010300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbf4f0bb4c74b2d0d0c915be014d17a669926e8fca2822c37254446324d0897. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BEQ010400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc546ce216977264e6257c2829c80a7a701989d02e43d008252dd987b3ee2055. 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/BEQ010300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a509558b29d467a24118cdfae6529180336339073d7f2556ee6e25fb6f682f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BEUM71000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f3a2d32ce7889533351aafc7d9f395893a30db63ca5e4152fc4f0fe1d4a8b3. 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/BEQ010400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f688d6791fba7a906cfe5d00aa44434b0017ddcc21c049e076bb06f5286127. 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/BEQ010000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb553c7e51e2cc8a74f8bab754a3506f49001136dc9ff091f22d1b20616d525ed. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BEQ010300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd122dcf70fff58be044fa855744a7922adae9dcfa71845b907c2e054196f072e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BEQ010000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1c1a1140cf40ab6c7bda213706718c3626eaf2e695242f06548061011a2a7c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BEUM70700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc997f34480bc2e1b1b18dc40f02e3fd60f91423e3a2b5db18079f1e33fd39c. 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/BEQ010400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa560218dea761d0a692f947bc7c708f90820c195d7954e36a4caab90b4a4b7df. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BEUM71000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a932a197a8a4ff07cda4f9b70e9740071fec9e46c6fcefb19f180f8471d6c9. 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/BEQ010400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923a6ac806ef9c128757a7b8761f1e9fdb2e0306c21cd0355f8ea01681f09157. 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/BEQ010300017.