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 0x6e56fdf339b2d7ffe97c32830dd01c0b1932c8bce986d74496e6155ec4e1ed45. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfc55998-b7a9-462f-89c4-9b70e36b0144.json and https://artists.proofprofile.net/proofs/artist/dfc55998-b7a9-462f-89c4-9b70e36b0144.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 0xd14685d30533702c9d864565b5668d44f76f914e40d5035afa1363fc738f8329. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/NLUR61400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2eb1be02026af9141f7a9a09e7b3ef66332a19e7ea79159c2a2f327826f2fb4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLUR61400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf88bb2e0f37a63f74e9911d55e1b074e9e73779a21c9893637e4f01193f62d. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:41:47Z), 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/NLUR61400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17d26479b4b4cd03654fa91e6ff65ed2b294307fa30425bf36cb788c0be5786. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NLUR61400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7fa832c02cc03640a0eaf1763303feaf8a216b5acc5ddf296fc9e5ee3e34bd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLUR61400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a2bd1c13c782db1eb01195d26dc8ec9f68294f3bcc21356514182f955958b8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLUR61400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fc26261d2d864419f90c7b70220f6585ed37e2bda0e7ccb882128bc66ee46b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NLUR61400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c0d1a3d8048ad2edc113703fe83d17268a4951c1fd5ebdab51a788e88b47c2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLUR61400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef127db1bb2e8ada4260bf6fa51fe3020167de4fc6d169ef55ac8d4b78645bbc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:28:05Z), 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/NLUR61400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f91f39517b88a451cd641800da6c0a942810f84fcaf36b9c41b1a996d00bc3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NLUR61400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacedf6eaf7b46efab16e6954cc7075f3fa3fa05b654e1cf56f950fbfe93ad887. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLUR61400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306f61995694bbe05c366102879976bb0dd556f812d3f278e57e15f6231736af. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/NLUR61400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16fd381de1a72e15143d496289a9a9fb28cd784cd5c58a171a1a90736ea88bf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLUR61400023.
Een Dag Om Nooit Te Vergeten (Originele Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6846280649230e78228375bc340600371afb81130bcb939f332234f2c1ecd7b4. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLK072100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92803568b4c3a6af39ff4daf6b2e85b3de1b623e652275f129359cebf06beaed. 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/NLK072100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ee71cbd6fc721aab498087607b2482ec71e1fab6c22fb2f3f2e91e275d534a. 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/NLK072100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa671992160902f817567d883ae5d879d82db8855d0427a868dbe958f1c240a8c. 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/NLK072100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f459b808d18fcbc187932138c04b66da77715f5f732302bb708207d7a20d1c2. 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/NLK072100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814f3a180835ac14e25d9b685db33eb0ad44e61235f5b5fea7e38b0bf00c35d8. 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/NLK072100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9673f8548dd15502f944298f8bec6fa24a2425bdbc24f5d31dc09f3130f58fd9. 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/NLK072100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2f3a0f2ce971e5d16d9c27bfbf9f982fe26d7eaa9c44737d7097d50bda0753. 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/NLK072100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efd68de82fc21f9df63810a8af82e4df616fb38fe64113678d7f20ddcdc9e6c. 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/NLK072100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5770eb7c66e9bb3eebe13961999ee121e24e6fb54879f94f06615b9334ccf3. 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/NLK072200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39969b0142876133d334b50d37e2e0b07fbd9541c4dbac76f594b520ec9194b4. 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/NLK072200278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94357f555c893115e7c9a2c41587506488a1b5662da7ddc1ea55fc72ad6f0d7. 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/NLK072200279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0936312faf491bfe8138ae6bb039ff30f597ca803da08e880461cbade336ad55. 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/NLK072200283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4afdb4d12494190660485456f5631dedd9550d0cdca5670f6adc59f1b6ef8f. 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/NLK072200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88629c65a61b5c11f12a44bcca471f917d91afa1f1e2dd02cd3ffdc98477d969. 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/NLK072200287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ef53b497863d4c8b788089c568fefe44c5bb1a6c0851d19ddcc2060dda2b65. 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/NLK072200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274b3273d00155a3a0367e894b9c2dfabbc9c3d84ef542b545add1eca49a6abf. 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/NLK072200289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a3aa76890db95fd1cc1d20c76be078b07345d2bed1b9d1c7bc84669a888755. 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/NLK072200291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3127dc0a2ce69b794c003e7ea859cfaf842970e80c0d5ebd8fadf29eaa18286. 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/NLK072200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cca0d4ad048c4829bd1d0bb193c8d9081fa7f25c5994870c494f846a765cfd. 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/NLK072200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5572db6c259cccea4d1f9be384ebcc58255324ae93f411f0895f24a1470a9b2. 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/NLK072200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e64be6a346f7e54ca8079392465047f53d744b26ea6e71027495bda53ee1569. 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/NLK072200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf463dc27a340b97555d9345fd680e7aefe7fd412bdafed57988cc2547dbf419. 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/NLK072200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932539780ccadee7529a4bad12946a8583ba12e9a1bedffd5fb33c9c7a566314. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLK072200084.
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 0xd8881c039e1ae5941cd2594a912ca96c5424af9d3dcd02ee4c6bb73a695eb63e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/NLK072200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08416406c67173ccf56a3da931f5e23318a672879aae4388e60946d59ecb7f8b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/NLK072200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8693c674e2b838d71d62189c6f8570f530c9e06d07180c7b34b7e7c8778646c7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLK072200094.