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 0x6acbee76e987a56175149149c3334bdef5efd7a058c63a69801d98447b80f8be. 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/f64cad84-c2cc-4a41-af5f-b7c6b579c321.json and https://artists.proofprofile.net/proofs/artist/f64cad84-c2cc-4a41-af5f-b7c6b579c321.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 0x690edeca7eb01a34f79fd3b1953a1292a3cc7323c7a2a6bb94bbffea7642b60d. 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/DEVX52000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2ffc8a13bbf7f8ed33d496ca4bc0ff368331f1ca106e4407da41deaf47b2e7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEVX52000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690edeca7eb01a34f79fd3b1953a1292a3cc7323c7a2a6bb94bbffea7642b60d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEVX52000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff7b64954235dc3f963f410e15dd9dd93776c3c70f003592a2bbcfad1090e4f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEVX52000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2ffc8a13bbf7f8ed33d496ca4bc0ff368331f1ca106e4407da41deaf47b2e7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DEVX52000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97ff73c5de09fa08f2d5c28200a678c45398a577d9a3ee8837e58e995914d9f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEVX52000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e17ddf85dbb5455ecfa47adeeb9b3223ea37b05a13c89b469ca93dfe183b1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEVX52300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1996b025f0b912f8da31b7a8aad01d5522f6e5db9b6876e8910b8fb1b36650cd. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEVX52300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef3a1d71bea901e2b29db222c6174dac15fd50e6a6dd273b7c8c427631643aa. 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/DEVX52300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e17ddf85dbb5455ecfa47adeeb9b3223ea37b05a13c89b469ca93dfe183b1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEVX52300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35080ace349bc6f80df4e7e334783e730c69125d45fc74cbcea89df80d06bc4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEVX52300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1996b025f0b912f8da31b7a8aad01d5522f6e5db9b6876e8910b8fb1b36650cd. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/DEVX52300011.
Proszę słucham (feat. Duke102, Stacks102, Skoob102)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da62b489f8c776e29971a51ebe5cd4cb453fef3bcf103234cfd24a218ffce9. 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/PLA552100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da62b489f8c776e29971a51ebe5cd4cb453fef3bcf103234cfd24a218ffce9. 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/PLA552100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77a24297f952ec25a8c9e235ec145e37713f80d2b4e9bd1283a2f3cdf7bfa8c. 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/PLV402101137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e90ad6806bd440ca0c85fd83d53cc05816b9203065df0e993b9921500bf669f. 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/PLB382400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe477dc8fa0c14683b5e966ac93d998734386f334f8b2ba56e8fc95c3f3fa353d. 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/PLF242210210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42d1d454020c451ca2a11b1a923528095a0eef828cd8346d73cbeeed0cd4caf. 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/PLF241906643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8492dc5199365cff30d19327534e0d64aae63489477457dc18bff3f50124760. 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/PLF241906648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44410f14ffc6c41721a7b6113e3238fa32d03733efe4e76a6401e6c638c7c567. 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/GX8LD2215432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe477dc8fa0c14683b5e966ac93d998734386f334f8b2ba56e8fc95c3f3fa353d. 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/PLF242210210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef3a3ae4d349ddfa040f04bd49b6780337e5a1457b3160e30ea086bd21c74a3. 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/PLF242007477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71244373b33dc44bfc7356ddf0e524d63e3fbfc2970c81596488b28deeef262b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DE1N12400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67cb84e19f1a04c1e00fd28328be04d448b42267a706d9a40c01ff8d0d3149d. 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/PLUM72400520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443c4ef4e33b4f9471801e9734212b6d1ffb9d5201b695d04bd9af1b9b07d330. 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/PLF241906429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d8e1df65a02c6d276d69ead2028de5a52be35e975ff1de83df109fc66cb077. 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/PLC062506770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd30724998ad6b9627ef5ef6fe0681fe159aada730a672f0d5ce68d79826cdfe. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLF242211134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1854fb400bf946b409f3c690885acc217e60d16821e783b513409d1bc2779c80. 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/PL44J2007365.