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 0x11f642ee1cd86beebcbc0cebf84d6ac15cc87abad7745c0ba7d249814636c039. 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/0cd43944-fdc4-4763-9c2d-5176e8338990.json and https://artists.proofprofile.net/proofs/artist/0cd43944-fdc4-4763-9c2d-5176e8338990.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 0xb685048cdf900305a12eb7626a46ee3e60fc85ac6d0f0bcb522a6412b607ef5e. 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/SE5W32309497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89e25c2ca5b3a6609f35fd8cf5553e1510539282a48df264c214c8b93bef123. 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/SE5W32308783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302e0a236e701ba48d65a3ed27dae811de6c16ab60ab0982eb6a8a9368506965. 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/SE5W32307938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cabdbdd60e90643a4357e1569070f662200f7098d59b6ede4fed26bf5352a3. 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/SE5W32203877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1c24bb5042c6f8188b8014f908af904a7aeb9203da1c00136861cd7d353cb3. 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/SE5W32202445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204d48b2732a766087e6300d8bd54e85274eb5f905218af075043254fccb00c3. 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/SE5W32202446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f3c4575c3e54f0549e89137764c0a19c71f59b5f5b7feb2f99d5a4f9994252. 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/SE5W32202447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cda2349a2bb8ddb0cfb6cd0d25361b3cc7a4b8ff15eec3fd55819086111fec3. 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/SE5W32201021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f3e6d3e96ba7e5a93e7ffd27d69afded0861272d076883f80b4b85c87caa13. 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/SE5W32103741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5eb0bc73baf1cc291bf72eb2623fbce5cdc94cd3648b6f177bacd95d9540ecd. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/SE5W32102766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f261b89f1776d74bfb76faf81fbf645d4a65948102697c98fa91b8a332436a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SE5W32102767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb885be046e2a9fc15b5b6bbe831764e2d0f9d97f5652e7ed14241b6fd661628a. 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/SE5W32102768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9768ce3af2bfec119cb49f5f5ca8c3b3b6e5ad2d131fcc0fe2b1863c626f3359. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5W32102301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd18420d550b3ee6206442f34abf92cfa4b930f703dc333d23fab3a6dae5571b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE5W32102302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172528917e955f0261816d7f4d4f40b41cf75d59019a3a06403d0fa27db1a1e9. 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/SE5W32100784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c124470e8ce2629200b6dafd8c3986c178a749c1927c25aaeac8330d490542d. 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/SE5W32100367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c07a61ed8caf9c1f0add2a03c383602fc5c84659f096d03ec36c62eed96aa58. 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/SE5W32100368.
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 0x16e4ade07dd18b8efb2f6368744e0c0c4a274f56311ac653a759eb4b1bcf6338. 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/SE5W32038002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd8e580d8402226ca2e1b31fafbd6e7b49d7549845e67457162c4a33ad38153. 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/SE5W32038003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f69d131342f83625a8777fa1a9bdbe98d76f9a843a7b6fb72c6d62af6ddde83. 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/SE5W32038004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaac9d08f1fc82aa5126b5b3ed86e0f101219caef0399bf555be58fdaba64a0. 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/SE5W32017004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaacf42a61719d479628362b0f508e2fcfd44256440cd4eea6203443dd5fa898. 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/SE5W32017005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0ef61db4cb229fb0d9c6096d8a4103fa7569ca32a8adf3de9c2f3bf514bea0. 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/SE5W32017006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b6046100ea959f17c32351454c0058c454f432953810fa953904af1eee7ed4. 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/SE5W32017001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fef7a794d713c24a373b94683199d567a5388e04305a07f3e17bd6a04220224. 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/SE5W32017002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c3daaec6cc1d53839c0e94a6af67fe179301098a23fcd694ca6bb8187e0756. 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/SE5W32017003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75af09879e14fe999216efd66637464cba145cad704171ec76831e0c7c1b560c. 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/SE5W31938001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dffcda8bd8ee4196a5bc7066557bf46bd8489543b5418ad7c713980a8b0089. 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/SE5W31917002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dbe673c22e9206d2971054548cb725d5b03b47b38999ee8644e482b162d3a2. 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/SE5W31917001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569fa6a041d6c07fa1d1e5f51c2ed760636c5d1877fd60790650d24d9c1fb084. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE5W31917003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf738db8461e82d2366d32c805606f2ec0d3c6c644d5900d67a5554185076d486. 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/SE5W32505979.