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 0xdb876d660dfadd7b6159ef8f919c2ef058786401123f89cfe339464fc98b490f. 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/fc9afc1d-6efe-49f3-86e3-3815ccbb1967.json and https://artists.proofprofile.net/proofs/artist/fc9afc1d-6efe-49f3-86e3-3815ccbb1967.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 0x7a986b07c339e45340ddaee280a59d2d18d668640750aab4e4fdbe0f11aaba55. 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/BCKKP2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc567947558b00ba32008892c9468ac0ed812539098ec2ed90906be729d33a3e6. 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/BRUM72201364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499701f369121200b6770a752c3850c3f1ddd44fcb4e893b26adb8caf76c2d8d. 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/BRUM72300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe377288f577484cbf30210b0bf1c868031bfaad7044bd40984740883140be9a8. 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/BXG6R2300929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6b30d7f1fd4f96eb8b989460f06204a21ca57a6aba3919af235ddd122688d7. 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/BCKKP2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9a87b8966e18a19bab379cb401c761cb74c24abcce0202dd5e033b9b21c2fc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BCKKP2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2d866770b7d17f317aab559b50ad1a767483d5f500bd3daa5a0e964b082afc. 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/BCKKP2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc992f7ade286f22be2586537f8453f0e09c473beb60b330d2ff55f1fc09f2f9d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/AEA3A2402671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b3b080611cdbeec2ce4ea9fd9c016ae754417d8f4da6a3635adf05601b154a. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BCKKP2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb4a593e96d56d3c180e6f0f49e147bebbc2050a7b2947f2807edcbeab5317b. 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/BCKM42400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad540e76a78ba946320b95bb917589222abe52a7a83c0363c7b0feb6a88f520d. 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/QZGLM2409465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afac4c25e07cae5e6ae6be4c0c2fe1169a0dba2fea38167c29745e8aec4fc04. 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/BRUM72301283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45552622eeb32e7c4d01a6dfe794c4b6d67a1c15c7d0f2349d4e283ee4cec82f. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/BRUM72301532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8e149e0e575e4598a84b842bf670c1ac0f86f5b0a19a377e2778cc617a2938. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BRUM72301382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653cb80550c19ba6b41b0be46d77f2501ae84113eceb8f0821ea0ea5a1dd23c1. 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/BCKKP2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0630c950124f0844b9acd6346037fc76f975e2e253739740f5b1c4e7f0e8c082. 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/BRUM72300823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b21200ed8ff53ede42446a7937a71117de3372146e0e5a56a23a81ba465e3d. 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/BXKG22301214.
Vai Novinha An An An / Citação: O Chêro Da Carolina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be4cc7579ea506d20aeec51df666a3623b1e42106059f433d0a918df0a405e4. 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/BCWV12300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f668e0b72465277667873d11ac7357e7cdefbd781cdf88d7037c1beeeadd6f. 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/BC3PG2300647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0218bb20de40113734883d985e348e8652bc21b1d4eb20c024de52bbc78a66. 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/BRUM72300476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a71d5ba861a5e8375f77642e068eea067141673f71c64d4660051b7c76e13e. 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/BCKKP2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b289c8102fb251e81d311b7d0ff7706a494c3ab53f09b2ee39425fbf443613. 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/SGB502348990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce86157ba50377f2f99eb18ba4393fd2c1e207ac3dad14b37327945171e6d164. 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/BCKKP2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb940098dec190dced6d9dfac8cd1bfd03504d8b9102dbfa78eb58f5e1c592bc. 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/BXKG22300561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1041dc2273a1f3601c92d142764d7668ca5210e6267be36fa77cd1f4e203eb0. 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/SGB502340637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27475cbe93debf7d57b6f6e5405c6fd8960f41ad22e69cb115ce72e791dd7e0. 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/SGB502340678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3854e966557ee0c9d2423bab20661a242818d72af2b86cb4d3bd1a558e7394b9. 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/BCKKP2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0db8371a700ba2c691d663ffac73c02cb02431006975519dd3b978aafc9668. 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/SGB502310984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27052f5aacf7624d70627d88ac9269af637d87b6a7b00298563f5a9190089663. 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/BXKG22201345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f5f3176ecde6ed20d31f8830ea003112b4ef78350def75f91532bbce244fa7. 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/BRUM72202339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3be9554f3cf364026d94eca71ed778b743053e24dfbdca26efa7edadb949544. 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/BRUM72202218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078bb81a4be7dffd0cdc1b5eb7e11d11cf2d8127dacf4282f5dafcf568bb74df. 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/BRUM72202102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0206f3bfc079495da3759f6c731e7d2ff945fd734f3db9adc5838354b4c9ebd. 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/BRUM72201967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50da82fc784450c7b24682a7f2f90cafc396d02d617c3e3841155da95cc78172. 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/SGB502288505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b85a4dafd58d551b7f559719673afae7eeb6077aad3c5f6b18484a830745ff. 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/BRUM72201708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d7a525929077f8a32afcd358750792f17d61855b5cda31389b627eecf95a62. 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/BCKKP2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c32132cdfe10112f6987cbf87fd2f493b9906893ce75fc0f8ac8da62c0f9620. 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/BRUM72200685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d24d4ecd30f5beca24eddc7f979d59ee280480cf13608fd74d72093085f8628. 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/BRUM72200537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa492d4ba8f587de7371a51d57f9bd0921a6335a915518de15318856f19bba912. 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/BCMS22100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb9f420833e87d58e6c493393673e47162328d9830ff54f0b3489b2afa7694b. 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/BCKKP2100026.