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 0xb4a53f90def637d2eb79f2b76d76e47dbedfde03e68d9902b7835a6f7deef40f. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae6cf9ea-22ed-4fc5-bc61-6c19f7f9090f.json and https://artists.proofprofile.net/proofs/artist/ae6cf9ea-22ed-4fc5-bc61-6c19f7f9090f.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 0x15a3931a83742622c9548d604527223bd31eb5967ba54db1d05c7b998b8159ce. 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/ES69I1600345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cc3846dd93df05d0b6bbfa3bc7b7ae41871dfde8720034a3b3f888d0741501. 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/ES69I1600349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc92a753d00f4866f11d724180ae96a7a0f1f4aef54ef597d5bb5b78fc8e59f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES69I1600352.
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 0xe5d0ccb6d2a31850aa499f7c7d109999fcff7ccf76cffa0e82adc7c58e1363f5. 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/ES7731102001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72220f815204f4c7b6549acec95f01c250210ea8d2c1c355f7857c2deccdbe8d. 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/ES7731102003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3da11c2b97e4e89623c39d4d6d98b5d2250c9ae88f16bd873a1c74931a0512. 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/ES7731102004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3c186fe231073206c1942eafe00eac0c20fa90f5e0cc273567300da063d081. 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/ES7731102008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14359e4c57e8ecbff7a4d82639820853c0d03e98c40eace77e25762a63f2d789. 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/ES7731102009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab318f5b6bb5509c7ecdcd0f152ea566dcff05f7dcc9f63a5e550169c5768618. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/ES7731102002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd859d402d3ca376351c173b77aaf418eeb00ece37d72cea5d7f1f0d762532b5e. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES7731102005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51887db3ff0599d60076fd5a305925475a09a94ce5b8dcbda2058586e3cbbf9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES7731102006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eeca04961890e0b05bfaebd822548bc6b5d5ed53790f5322a4acb0a2a7e96c. 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/ES7731102007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c20ba69321b99050b36df156510e1efc1aad1276cb0b31489c6b8ba90de24. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ES7731102010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc09f13f0bb892afbcf827772382169688357b4951b97f91c67891b7ee63ccff. 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/USL4Q2319264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cba69ef60b14bf02fc9eecc0285bfc490c3f4f361ee97ef90cd7da8289625bd. 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/USL4Q2319265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526eb7af7a3113f533c237251b46fb82643885d49c6b7891825ae0a9ed2aba89. 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/NLB152400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afb6bd2c9cedc1e0b19c4b29af7d8cfc72f97294898c3ab1a5b550765b49e92. 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/NLB152400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86077ce1f05792dbe89ab5b412a8cfce4cdd46f3f5234e7f8af17a97f7ac3e94. 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/NLB152400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961d0ce7eeea595c87821349994feaec046a947b925a6ebb2e09f9473cce8088. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLB152400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49afadf21637e9340e984320a9f199e441d446337488a205b8b235b30cb90fff. 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/NLB152400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd7594532673d2628ee5ca7a654ebded98f22f74ed1994e2e37947e6ff5d0b1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLB152400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf861b302fc3c3b491e0e3c2aa71de1af37145d39569b78330b522e1eb84c6b16. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLB152400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee0dee216d31c04b5bb8c9b25d49a29cae97d375656a209495b76ad43ba0f9b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLB152400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace2a5e1c3cf25decf1b71ccdd2e4439742a280dbc8fa3c6c49a003649d861eb. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/NLB152400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb482b4713f09cc5e7d9b5bea6eed5b7104edc737d2a38c80b9fed985523d1aae. 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/ES33B2221403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41004f75cbabf573bb57c4000386e6cbb5f20b47b5b92e5702d2d01ecd5d559. 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/ES33B2221405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0026905f83ee5c150e4854eae4d8d24539865c8dee601749f0b45ff515d1b995. 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/ES33B2221406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2f83896ea7c5a6c0dd4037ef345b8db654965cda5ead627b38afe8e62d8153. 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/ES33B2221408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd884baaf0d31ec37a3d348e4a8c0982a7d07ede5b9e63e0ba802d4de4e32386f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES33B2221409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ca042967f7e12f292bd79233be3e1f4c0fa79111478026b186078103e4aa34. 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/QM4TX2419216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8757c3a98506b8d20383489ccbec3e029af7948c486d0ce9804a6600202ba6f7. 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/QM4TX2419222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b376d67bfc185ab6ba3cf17a924fde31b2bca95fe3e37e9c638b66353a9ff4a. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QM4TX2419214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7540a49ea1e4d5ccf4b6b4cc54c6c0f9cae4724c3a9db1961d2dd7cd3a0c28. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QM4TX2419215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa471b967e72e30255c7237f24a3a1a481c2663c5e8fdb6cd5c355b10a15f811d. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QM4TX2419217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c898d0a59777158ab675150042f7e29a0d35d5be0d64141fdb72fd9e37a52c. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/QM4TX2419218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b28f4b10c856ba2152a9b2b23a2cd6a523089f6f1ed7e04ffc6a107a59c483. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QM4TX2419219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42496d67e3d10fd7e087a573fc1c1870d00be6f2c3019a736b106ae5437e27d7. 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/QM4TX2419220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5b9660b5704e51b8d1283f3020a9989e1a77afb7e838c529992a5e496188e2. 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/QM4TX2419221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5380f0311035750df4fa652d080cca2c758222cc87ed4825b5e30263767456. 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/ES09S2100055.
Malaka (Música Original de la Serie de RTVE)