Feyenoord Rotterdam () is a Dutch professional football club based in Rotterdam, which plays in the Eredivisie, the top tier in Dutch football. Founded as Wilhelmina in 1908, the club changed to vario
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 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 → 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 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 0xa561557ed9d070bd7526ac30e5cc2f5394e6bb386ac0454fbd780a214f030264. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TCAIO2406465.
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 0x454d6342a0500d27411351514723fdbba9971fd41a1c168f5be9cc23702b78b3. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCAIN2406466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45960f45d86f402ae0001fc1dbe9c324bb2f1a0f6afe101fe2d9df962163935. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCAIN2406470.
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.