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 0x03d7027cfc9530e2d041ce86a8b17971547c9a0ad3f4e2f453c533645fc7ce13. 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/16f01895-ac56-4580-be17-80b69bd49314.json and https://artists.proofprofile.net/proofs/artist/16f01895-ac56-4580-be17-80b69bd49314.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 0x73f9d26e727a033ebf5944a616dda5a509681c54ca133f119d884d0f82b4e332. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DGA092366342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd717651f02f369977722677fce69d21574b1ac93d1d57086c87f07d3daf96ce9. 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/QM6N22290291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7617becc50f61092590437029682e2122ff96fccf1235c2f6c193f4e8ed8d85b. 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/DGA092366345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51b514433940540f8aa99a69a20efe79fb2c1e8f8484aa8d2152be056fb26a3. 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/FRX762395687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb5fc702565150503c9066e81ab661613033d3e8e6a26dbb6f6d42f9e1dbcfa. 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/DGA092366347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2597577ec83624abbf1c1b9240e8d097468581e6156aa49b0e8f03ed98e378e5. 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/DKENA0400302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc5a321e206d68395a1880d6e907c2dae642bf672bd2a9e4b1f88b39a0d8fea. 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/DKENA0201703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7090b4b62107c390316f522c0613e5f8c55241798090710b98383660714a2e38. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DKENA0101201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf291a6a375d73a27c9fae44919603c44e5d99d7315fdde62e2d2cc22d00a92b2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:04:25Z), 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/DKENA0101206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b43fa50c014bf01cc716155dd75aa5813ec0cf8242b80ec69d2b86c8580c4e. 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/DKENA0101211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec67877d24c48a75f4f1a38b44566b7cba27c32f7509f74a62923d850bca8ba. 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/DKENA0000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef62290d4e7fcce48a8f254afd240568ebdf10419defde3cae6aaa6ec3b5356. 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/DKENA0000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a472f1fd66595a31ee4d179babe8b67aa5a5dae849f878b624d469299c93b5. 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/DKENA9600903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89d632853953d966cdf8bf4a2d4c1bcca087d7d49ba4d96bf3d35831d2fe8a5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DKENA0000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eadcb9c548b03c51dc1929d5a9e256a32c5bfb8b86ca1d412c94ebffb519f4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DKENA0000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6107597a136be3bc241e52436ef90fa61cee7062abc06a77f9c1954c072fce2f. 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/DKENA0000408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe108aceb6c48aa995c5efd48def76673fb4c5ec70359854cd8d885c1de85ca75. 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/DKENA9900403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed85a1d9d8b851f7fa47da4498dac00188cac04da57a9469fe7c33bea8736a19. 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/DKABA0701374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0723d824688de46035eb7721a970f0edd6ca9c909622de729fc8cd2ba566993. 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/DKABA0701382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7dadcaa3d50f12a92b1389f9329bcbe6b4e94ea0e0221ab582bc25493624f4. 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/DKABA0700590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc98e8070907d57e8f96d0fbf659b5f877a6ad472f147caf2427b48ab56c621. 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/DKABA0700598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0f9729a9ffd118becc42d5631236532447aa07577ac9c5a01e34865ff60d77. 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/DKABA0700599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c688225d1b088a69a5af3090bebeb02590945d6b6b6c101c280600d5265d6a1. 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/DKABA0700600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4805c9f7e7624ef52e83f30936ca08f8221f3f804cf72663286193f28933c2. 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/DKABA0700601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e0cfe4a5f6121b3a9c927634cdc20e41252b858d88f68635ba238531f79d9a. 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/DKABA0700605.
For Fuld Musik - 25 Danske Vinter Pop Hits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc10c8091e74ff9abe51c98d2662d2aa19cd0f483ac44975837075c20f05a22. 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/DKABA9508306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48025b38cf645f561e65a962f322ca1df1f4296349e4acf07782ce75650bca82. 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/DKASA9809601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d8101c8158f9971f40f42acf3838cd6067d630bd21dc214c47a7b1ac3fd183. 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/DKABA0900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62938ec0c24969459542ebc4b3b30a25ed321e1afa75e83b7ca8aef310191ef7. 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/DKABA9706802.
San Francisco (Be Sure to Wear Flowers in Your Hair)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b618cd50a00f37d9313edbb74375cb9e4b9c1c8b70e05bc12687ab57e0860a. 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/DKABA1102993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838aa11139708d74f86c26f171d5faceac5c1d63e9dc88e62318972d4f1894de. 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/DKABA0701045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50592773a7307e235fb5dc7d184b2a23a1cbcd2dc951cbc9e55de50cd7ff75a. 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/DKAXA9433401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde72fc715743a0e94c56bb3c43dfac141c00f1f2cb395151a4b6636a70585c43. 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/DKADG0602314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b88f9935e869fc54e39de95312dc467f16447f36d04078c4c7a8bb4b0e30fa. 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/DKAXA8900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7679dea03b47fdd899aa86acbc8dba2dccbb9f2585a53fdc2a4b7aca4a847a45. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DKENA9401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65e27214dc58966ac28726aa49fa1ab04ef6383a6cc6eb024b8b88909398100. 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/DKABA9512301.
For Fuld Musik - 25 Danske Pop & Rock Hits Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc605046259f26157f033a1d8256ae8950b29f9053bf0bd72f82146407b5fe72f. 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/DKABA1100644.