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 0x34534ecf13b829defdec9718b0a9e741d1ac09279ac105126a5610d18b0a54b2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba648169-6fa7-4c4a-9dda-8ce87d00be37.json and https://artists.proofprofile.net/proofs/artist/ba648169-6fa7-4c4a-9dda-8ce87d00be37.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 0xc95dcb6ddb0a51c329711f1f320ae1d4cf3972a0c8d2541e5d4b29204ab53c83. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ZAO012000183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb492e1b445b5247e8e6532688506f9833172d22568e874fe0c94efe77f356f63. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ZAO012000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bfe4938b36d0ed3ff9e2b2ba0322f291157b9c2bad693b9e82f1dd0ee8cf61. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:39Z), 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/ZAO011900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9439830e300293ff6777cd2a98297bdbb9cf08a4a36e96ae97d8fc582c0790ab. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ZAO012000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79689d1482822ee5a6dba716b8275357dd89de95fa78a330f73276a7386a4f32. 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/QZWFE2479357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a430d6664970c3a62591c841c899549ed486f693831c8bde685acfe8e84cd31. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFE2479358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003301d845bb23bf899a3052a808431ef9e82732f8c7b7d7cdf3d01fb5ae5dca. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFE2479359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc6b905c2fbba3b6e54774aa228f8681cc9129746105fd63427badf5331a83. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZWFE2479360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0349e6b2f88474fb9c285488c14f6515cc16e1055ba406c285a24edaea6e5a2c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFE2479361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060ce3dc18b5002ea18c07eac9f8828bf5777277695b2fd5e1e46437a3991895. 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/QZWFE2479362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9bb54c3870d3ae4ada829f9eeff16db3bbe46c6a5274fe450dbcdbc6ce79ab. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFE2479363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec23decc7195c6cb7c2a8604d2090698dfb6b68a0caac8fff254a877f17aea8. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZWFE2479364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b00abc9e640fde639e3f4c082792a466a5f53933b632f08470c1b295ba2de3c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZWFE2479365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc3aca98ad0dd0b4723399a4f0ed3c411fe967bdde220438585f529d049bf0. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZWFE2479366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73481ae85a2a3334f846e1cac878da7f8a9ff518729b13e85428c43173d617df. 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/QZPLS2594870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8027098c532eb285592c65a067566682ca15fd9b71b06d1179601277efcfe53b. 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/ZAW3F2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f8e8ec527ac871649b95a4d8a234987ac2df488659a7a05b09e8dea028a19c. 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/ZAUM72400022.
Celebrating South African Women in Music 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00e5dd6397972010c60d1621bcf2ada8a3417d8cc38daa284942be792d4b4b7. 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/ZAO012000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf344f288713a76a88ed3175bdcc760601b84cd5078d2600510122dc569a951f4. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ZAW3F2300002.
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