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 0x6972c120fa77996ded2f27728cc36a589c0bc2c17c0b5d577c786251e6c231b6. 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/41cb1a6c-7605-4f1f-985e-462521708eca.json and https://artists.proofprofile.net/proofs/artist/41cb1a6c-7605-4f1f-985e-462521708eca.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 0xde071edc87545cd4b66f1167226445855b5e842c46d0763441e87572452120e8. 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/QZZ7V2440514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd7985569e9552e8f82e85a5e9969833b283a8c0c3098ca2e5f8403bea6fd4d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZZ7V2440515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15127a0ef1f8225e153efb16c25f4deeb768a9423812a4c8c4cedd12ccaefd4b. 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/QZWFR2477174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fadd8f7f19f9f024bbe72ff3b554aea1b68eb220fd6e866095a21954d060f59. 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/ES75E2411203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c452d803367c19968480ee09cf247ee033bbc27838f735dd647c19f5be5e2a1. 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/QZTBF2477980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc6f649f3579e6524c79f78b1683ab5744b0bf371a797648e44da4bf247da44. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZPLS2495502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb64da3de4a37935246c9d63944100c9f9daf77bc851e06100e6ea46f434535. 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/QZPLS2495503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf74ddef1a7248796ad5dab9728d12f6e6df4777b02934daa4c972e9b3a737e. 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/QZPLS2495504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb438733af9c15372f43a01cea04c2ae6d9c2d2e3e0b9a8067da094f8eadbc9ca. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZPLS2495505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d30a015322f790b34803a561d1abbbab10fa022f514cf11f1f36ab3b739319. 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/QZHNC2438606.
las dc en los pies y el jnco arrastrando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460cb4c60b7edac42eeec87be5f77dc68642af04ee9361ba0a11312165a58a6e. 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/QZHN32424714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77942eade6efb429d2820320eb59bd3ddb111bad76c1ef22267829631fa11d39. 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/QZDA42486754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ba394cc55cae8eb526508ee943eac7c759be218390d484efed9c80d2756a99. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZWFL2307867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9b4d7a27c0a3be6c28558c0af87ad2ad56386aef197b971f5e038e9c548c0b. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZWFL2307868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ebc62765f6aa22f45063e67546bf5d46bb5362e37bf64099fd3e09f7fb23bf. 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/QZWFL2307869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe713cfd1d5444f8656b9c42c968ddfaf62fa0d7b22699ca66852a6bb76d154. 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/QZWFL2307870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a54f71cce9f404816d63d60304a3296bc98844620c564e3f0ebbace46c17f7. 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/QZTBB2320247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5feb75f99fa469a5f5c04ce6ace9866e4501907462ca7df98f1f96791a2ee9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ES75E2306149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2105bfdb151a1172322729efaf5569dab5c963262a3189d1672d951567e6d45c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTAU2362366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce0ec204d82808a5efef4e61906b0ee4b3cf7df8c4ef0b44e057939e6cc7f11. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES75E2304582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3426279ee24c427f8a17a41f2fb46f4bfb5a9ea206bb5429036de35f11bca79. 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/QZNWT2326001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981eed7b4101aabcd43a419ba999b332e58e329e1fc91959b86d522ee1cec24e. 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/QZK6M2328616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31948d8fc4d90a8ffe3dc6cb844a81e4b5c2a2835403f6923686f8d40d5c22b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZK6Q2368844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d961c6787f8b8ea3b43d96ffdb97647cd01c0f4ba853ffb9c7fb05c6ae072d3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHN62332565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c496906905984f36520e00981104bdb69718ec2372ce37765fae25d1b50544e. 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/QZHN32320247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2935db5b5a5d8deae7403191506e26d2cde68d1edc71b1ed6ea61435c4a8fc7e. 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/QZFZ62314909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1bf06432ee6afd979015f1c28ec594ee1576a118e507a8a3c8b9deeee47455. 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/QZTBA2205357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d10ef35244547f0c478dafecfe9d97471d94e1a36995cbe82932789e089c422. 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/QZTB42295347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611f1d7b7a200ff06f1e2bad533912cca6d61e0f2905b2411dd9ca81871859e3. 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/QZTAX2219837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5ad8dffedf0ab9c93f211af1e3d24c85c6e0859f6c7d90ee1d83a20c57c6d4. 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/QZRP52269127.