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 0x6b78c822fb938e28e3cad0f1cdbf42a02cab91ea1242860da133873fa492273f. 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/82ae49a7-cab2-428c-9a5d-c3c0252eb0b1.json and https://artists.proofprofile.net/proofs/artist/82ae49a7-cab2-428c-9a5d-c3c0252eb0b1.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 0x0417dc2ed9239ba2fc64f91441a213eaed6faed9e319ce3f4ce3bd6d3301beef. 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/FIUM71300992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316bb8ebced08f6cf81093f1eaa120829c19583de02dcfe352ea9a7098c23cb2. 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/FIUM71300993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a5b3e4205536d2097da8fc72c5b74812d874f34569ae173ce616ab53d44cfb. 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/FIUM71300994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff881b5103b93a75418b6de3beb09c3ffef26e3f1dc9fdbb97cfbf0307f309e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FIUM71300995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be7cce8b99e11ebc1143e06e98121c105fe837882761502141f569e354464ae. 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/FIUM71300996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310304ae3fa56ee4a5e37e4f59945b714a5fb6306e73ed061b07a8d0b48101b0. 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/FIUM71300997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7a01ab846604f28eeef9bc5fdd2e0cee35f441b0a5d4d529457e8d251a4abb. 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/FIUM71300998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0d049ed23c6dc4b13a2d0522be87253970c6cd705c9e65668793040e88e73b. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/FIUM71300999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98028a6a4a8a2f60397e0082527bc722ee1b15b5add516c9bcef537c5e208a20. 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/FIUM71301000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817d6dbb342cc6378edf27058bf17f4795e510b3f62d46e1b45931bf53483c0b. 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/FIUM71301001.
Mummokana sairastaa - Sairas karhunpoika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2111a0d4eb413ba028457a490796eca917f7c13e040b919ed66584d369b61b5e. 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/FIUM71301002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc861212419ae9877b0f590bde6cc0baafe45563b5ec22ffa39b9d847849092f. 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/FIUM71301003.
Teddy-karhujen huviretki - Teddy Bears’ Picnic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805954d54ac410b0de61984be884d94a908e89370f5a9f8093405d324b63605e. 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/FIUM71300796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd35019974eb43a6e667e7d2772f6f724f3217bda1df8a799fd71884656c514f. 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/FIUM71301004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb022f7ec1172f270d621f4632ffefc32ff9e196e94cbf558c5ab1a7052e5d2. 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/FIUM71301005.
Pahaa sutta mä metsästän - Leijonan metsästys
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98294f9c7c2fbb5ac826737fd7a42153367e1c8f30e26f609e277e60a44399ac. 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/FIUM71301007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b237ea58c8346d2b54b66d7217b414d1542fe50d50d6510112db20573c617f7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FIUM71301008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90fe7e2f1beee8a2c5e5168894bdc6c2f75c5288c609a6b30b65b2fba90579a. 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/FIUM71301009.
Ain laulaen työtäs tee - Whistle While You Work
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d6cefea73bb64c4018a7e0865b1ca302eebc200b6594bce94af8f90c85ebd6. 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/FIUM71301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a50763ae683fe50d9d36fc2a8113e7e70514b433ed8585666c04f8b7b0459fd. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FIUM71301012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a91fd19079fd794330ea7c8efc291999f5bff626888d272c6b404094842849. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FIUM71301013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f439aafb6f4a1aaa35f90e321e4114b509fa8f6631924cfd12976fbfe5a74f5. 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/FIUM71301015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5de581dd5282b65c818b60452798da617dfe84489a100f34d6531710c8889aa. 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/FIUM71301018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6315c67986f65da651e3d04a8df8c529928b01ac04701164bad5e4af47577278. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FIUM71100430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0544c61021708069a23afa2f18d0412ad8a0ac61416ea335aef38e3267b8282e. 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/FIUM71100415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f95368101b2635af057fe3ac5dc7ddb2f497c1e560265ac405722c0cc7a88d. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FIUM71100417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff52b4ea5ecd9bbac9fd366486825a80b0a93ced1c392d98b16d61b217591ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FIUM71100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb66d8d587b98dea4564a1cc95592c38f43de60bee955b071c64c74f40fca0be. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FIUM71100418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81743a725bbdf5d8ba773e7fd5e2bf63e19e054e3e226ebbcc0d9afce7989707. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/FIUM71100419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d48336567b52e757793d183b075e1b5efb2988673ad13c204487c56379aded. 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/FIUM71100420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3812dd4c3fa646da36f159eac1388602ffa3cba45d94ac0c20f152e28fef139d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FIUM71100422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d3e04099dfc4ae2587b483bf63de6c799e8fbb97d4ce27ff1bc3e46e9dd501. 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/FIUM71100423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ff2b1ba531ec875af39d4840d112006ddd8aa4b418370d30a39d4bde0ebcb2. 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/FIUM71100429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52bf238070fedeef680d449f91b3d3bdae2fd016002dd6d2193e8f741d815af. 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/FIUM71100432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7bedd4f04b09d41b84dfce0ae670a1e0e9eb987e81193f633ce71227354b8a. 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/FIUM71100424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d073493f606e8deeffdf63d5d68ce733a66dc28bee9ccf0a2c4a333a92bdfe. 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/FIUM71100435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d486621f5dca31d285cd68a3ef6b8e15e402001c493bae26a3931b1b410ba94. 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/FIUM71100656.