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 0x413ba0b1ed24fcaca1b3d5f2a87f5b6766bc0ca4c59858a36ca0365a3ac58bec. 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/326bc978-a542-4873-8bdb-99ed3f8df5cd.json and https://artists.proofprofile.net/proofs/artist/326bc978-a542-4873-8bdb-99ed3f8df5cd.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 0xd90137292d6daced31053fd2ee22b7feba0bfe7ec7a1535e038be19735c4dfbb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NL1X12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d4e17218924fa10a6cab133432e976699fde6c5a9e0aa12d3b57faf2e06a80. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NL1X12400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c651ba86b827db45d9c23d57a5e8acbaacdf73ad3f1b0c58fcd75ac6a363bf. 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/NL1X12400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423ccce46e91c6cde4b86907b1345bc61a8387f1702cbb872be9563cb8194f97. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL1X12400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396dafd45873fb95b68a38a0dacff6a049803f98bf0e17e1666b61e532c93250. 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/NL9AK2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95389cf4775be81d4371402cb372a3845078b12899fff916efcef76dd9460243. 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/NL1X12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dc4e59fcff90a61ac537ce4682ccc5b0145a4f230c95c16ff9be2ed9888ef8. 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/TCAIR2419985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ec5d10dc95741bbc5bd8b637643a37ca1e20b879e5497a8078bdd3b7fd0554. 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/NL1X12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d4e17218924fa10a6cab133432e976699fde6c5a9e0aa12d3b57faf2e06a80. 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/NL1X12400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9e0b7d76c40ef5d7203638ad91e330a1a59cdbd1b2694eb153bf37d421c3ee. 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/NL1X12400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e480a65d40f66bd2b29a99d572cef18743b1a4bf8ba01f3cfd3b6f044a1780. 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/TCAIL2456235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c651ba86b827db45d9c23d57a5e8acbaacdf73ad3f1b0c58fcd75ac6a363bf. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NL1X12400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49066bf9222fb22711c8ee935e2d51502e10fe5f7951e2f0d7fdb27f076f903. 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/NL1X12400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15d80348464dc35293ed4ca03a6c504541a12f9584704be8ac95bfb907c16b1. 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/NL1X12400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423ccce46e91c6cde4b86907b1345bc61a8387f1702cbb872be9563cb8194f97. 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/NL1X12400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396dafd45873fb95b68a38a0dacff6a049803f98bf0e17e1666b61e532c93250. 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/NL9AK2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95389cf4775be81d4371402cb372a3845078b12899fff916efcef76dd9460243. 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/NL1X12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90137292d6daced31053fd2ee22b7feba0bfe7ec7a1535e038be19735c4dfbb. 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/NL1X12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ec5d10dc95741bbc5bd8b637643a37ca1e20b879e5497a8078bdd3b7fd0554. 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/NL1X12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d4e17218924fa10a6cab133432e976699fde6c5a9e0aa12d3b57faf2e06a80. 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/NL1X12400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9e0b7d76c40ef5d7203638ad91e330a1a59cdbd1b2694eb153bf37d421c3ee. 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/NL1X12400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c651ba86b827db45d9c23d57a5e8acbaacdf73ad3f1b0c58fcd75ac6a363bf. 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/NL1X12400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49066bf9222fb22711c8ee935e2d51502e10fe5f7951e2f0d7fdb27f076f903. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/NL1X12400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396dafd45873fb95b68a38a0dacff6a049803f98bf0e17e1666b61e532c93250. 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/NL9AK2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ec5d10dc95741bbc5bd8b637643a37ca1e20b879e5497a8078bdd3b7fd0554. 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/NL1X12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9e0b7d76c40ef5d7203638ad91e330a1a59cdbd1b2694eb153bf37d421c3ee. 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/NL1X12400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49066bf9222fb22711c8ee935e2d51502e10fe5f7951e2f0d7fdb27f076f903. 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/NL1X12400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15d80348464dc35293ed4ca03a6c504541a12f9584704be8ac95bfb907c16b1. 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/NL1X12400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423ccce46e91c6cde4b86907b1345bc61a8387f1702cbb872be9563cb8194f97. 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/NL1X12400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90137292d6daced31053fd2ee22b7feba0bfe7ec7a1535e038be19735c4dfbb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NL1X12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9e0b7d76c40ef5d7203638ad91e330a1a59cdbd1b2694eb153bf37d421c3ee. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NL1X12400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c651ba86b827db45d9c23d57a5e8acbaacdf73ad3f1b0c58fcd75ac6a363bf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NL1X12400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15d80348464dc35293ed4ca03a6c504541a12f9584704be8ac95bfb907c16b1. 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/NL1X12400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9137cbb9ee985be6b05b8efab04d3728ad00ea13f7303384d5bb610743e2f01. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLUM72500652.