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 0x8abf9db73c323b88d8a95dbba30fea6bbb44a7f25978939f516bd16075a85206. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a279224-f265-4c36-bdd6-7c235de6100a.json and https://artists.proofprofile.net/proofs/artist/6a279224-f265-4c36-bdd6-7c235de6100a.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 0x10bf4bf345bc216a68fce8c8fda8d0c4f00edb486a6fc2db06a698ead8bbcf9b. 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/QMTUP1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4377128b902ccbb417e7dd87e7436d10801e6609c08fb9758f8b8128a6758d2. 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/QMTUP1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5d1c21e096aae9e6bf289821ae88710175a93add07dbbf5734bd63be79be76. 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/QMTUP1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2e0119b48a367300536e2d8771555bbdb6d73d283c90cf231e6c0191676d9e. 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/QMTUP1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9260b5802bad0cfac272d91ba0bbd3cbd3ea9daa4905b07cab1eb52ec5f3c738. 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/QMTUP1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a836dd8d4b24c6f843233ad1cb050f98f0116c6c9f116fd70acca211b4737a4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMTUP1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b6fe9f2c0ddee30b1f68ab8c7fcd97d3f962dd6fe4a43d519e9efdc8d4cbb5. 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/QMTUP1100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93801e51c0400791af27363df6e1b3169e6db78270912c2471a4dfa3f880350e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMTUP1100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d0c42aabff049810af38102d33b0773dfdc21dae86e2d09cc52c74284f5851. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QMTUP1100012.
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 0xeb3aa2db4fb0c66f1033824cddf85a534a4572c591fde83f3daa12b96ee9944f. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QMTUP1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ff4537b780db64ea74f81396a6a10b861cb79d579dfd3f490956bcc15eb064. 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/QMTUP1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc18fddf7743e060e623a5cf16dee88076bbf5a885670e42cdaa4a072503575. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMTUP1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf898739f9eb5fe821dd9a82f5f337ef5d811d40f584ff258aa11f400a1794e2. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QMTUP1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bc01da0a0ee4b3020d7548dcae6142e7fad54cd7b41f8a94b966354bd5ed32. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMTUP1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcd7943aa4c4370be0802b8c4100029388b035ec81313c7779979121e239342. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMTUP1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2b0219497a08e2125e73bef85c0810c68ca6021491aab5246aad15ed20803b. 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/QMTUP1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadb1017304f0fbbb2146eabe781e0a106a1284e12a97e528e2568bb60de2cb1. 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/QMTUP1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45df968669e7dd8ec91933e6171349219cb9fbfd848ee239a662623584269bcb. 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/QMTUP1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8532a402815fb4fe7209d0e1a0985044d1eccd91a74c3cc5a63ac99d975f89a0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMTUP1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6977490d4b2ca3122bd51913fa6bb3f18039b61dd40a756afb2d0af7598d60f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QMTUP1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3fc76a7970f1ae8be798f07697e341737b55b47fab79e958014044327ae04e. 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/USHM20765283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aa593f3435d628c17af95c4eece62423c3352686d86c2ebb63442224a2fcdb. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/USHM20765284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b600313474ba666eaa9b369a4f2fee2b0f709ee743bf66c0ac8b4d67e4c1d58. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM20765285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbd10f08b6f5d16bb37d9a726f2d6c09b60e83e88d8e507e60da4c1fd414a79. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USHM20765286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c13a3a98ac029358d8dcf2b4d546a4ccac2c7200f3162178e8888d08ade8d2. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USHM20765287.