1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xc118b8442a54924e0eaf5aa54ca373faee557e06b2acb536b3793a41c4338a44. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6eced585-4545-4a91-b06e-8ea58e088b1b.json and https://artists.proofprofile.net/proofs/artist/6eced585-4545-4a91-b06e-8ea58e088b1b.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 → block OTSBitcoinBlock must exist at that height 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 0x043c1231433e9b99430ab970d610bfce6752811a889a5f5f36d9454b78a64fab. 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/NLS240800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadbaeea0c50d5c520e73a9a3d26b7c37fa8606f1b3262d650eaf038e222b52e. 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/NLS240800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27e27b1df93f987fa840968cfde3acce34625ec713e29a6c1422c8bce4e5fc3. 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/NLA242000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613b596ef0d850b6a3beb1988bf9159a56af165545623399fb5a8bce1281ec6f. 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/NLS240800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b9afd6827acafb617f4891ca2b86665284797719d08252bd90ac3332c4f0f1. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/NLS240800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc12ef7aa138b097e8aae25b3d345a94d8e7ea1f82e91253957db877e504b755. 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/NLS240800078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f5d131ee5e07e5443f4c437b250dd55023a25ab0b08e755ab8c3af8ab95806. 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/NLS240800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2257310ca7e45817d74dd32259bf71b11bb2f947d54666ccfe64386345ed796. 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/NLS240800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d21b469008cb1139802a31bd21dfbe02b03490499669429d0ca6e3a242e01. 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/NLS240800082.
Willie Batenburg & De One Maine Matsj Puppies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f07d736a04a4f2b3fef2d38d4da1a9b88a50dabc0db75ea76a480c2770db1cd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLS240800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4650f4fceae7aece3f0997af866b780be4bc9135ee73e9765f5234ddeb469c23. 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/NLS240800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7868b8b302a59b51815c27688238a2ec4d9c1ca945bbe2464430c4dfb8f3d3ae. 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/NLS240800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0928fe7324527732e7798ff746ae778b134d412a9b17c40790d0e46ca25326c. 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/NLS240800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502ccf2d0fc0d143c47a7eece08fa26154ef3a2c4765178758e889155bbcd080. 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/NLS240800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1255a540417f79523b493ff741d037daab40910c1ec51a7deea14e09f3140ba5. 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/TCAIN2406457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833299ee7df7eff7e87ce7c3f35191a89bb5a3d9e6385c9094c52e3c5cf7379d. 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/TCAIN2406460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220591aef351aeca09e3236f471146603c173b88abd97fdad5bcc0395c4398ea. 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/TCAIN2406462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2465bd31f8a2b56ccf617585bccc6bc4f8753911ebf2024f492a6077d764e32. 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/QZK6J2082011.
Overal Waar Jij Gaat, Gaan Wij Met Jou Mee!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a241ce2b6498f5caa543f958a700830edde6011774018a725135aa33a4e7e1e. 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/TCAGO2231270.
Feyenoord We Houden Van Die Club (Supporters)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b61dd5d24d635e4998c9a2f22af6357f1f80beac6f15243de54ff763642514. 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/TCAGO2231340.
Feyenoord De Club Waar Iedereen Van Houdt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c8aecae3340c462cd6a69aa68a7c197ccb9cbd8cf71559100397b04eb69111. 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/TCAGO2231490.